a(n) is a list collection has elements that are ordered by a characteristic of the elements.

Elements that have an intermediate number of valence electrons will behave more like metals if they are lower in group .

What is metal ?

In chemical processes, metals frequently lose electrons. In chemical reactions, nonmetals pick up electrons. When they are lower in the group and higher in the group, elements with an intermediate amount of valence electrons behave more like metals and less like nonmetals, respectively. They will act as metalloids if they are in the middle.

The elements that make up the periodic table are metals, nonmetals, and metalloids. Metals tend to lose electrons in chemical reactions because they are electropositive.

Because of the weak nucleus-based attraction, lesser elements can easily lose electrons from the valence shell.

The amount of electrons an atom must gain or lose in order to achieve the electrical configuration of the nearby noble gas or inert gas is known as valence. "Valence electrons" are described as "non-filled electrons in the outer shells."

Because they have higher energy than the electrons in inner orbits, valence electrons participate in chemical reactions. A specific element's chemical characteristics, such as its valence or valency and the ability to form bonds with other elements, can also be determined by the quantity of valence electrons that are present. It also provides us with information on the quantity of unpaired electrons, the number of atoms that can participate, and how easily the atoms can make bonds.

Learn more about metals here :

brainly.com/question/11302375

#SPJ13

The density of the solution is required to convert 5% by mass acetic acid to M (molarity).

10% by mass = 10 g solution/100 g acetic acid

One mole of acetic acid in five grams (60.05 grams) equals 0.033 moles of acetic acid.

Once you are aware of the solution's density, you may determine its volume and divide the number of moles of acetic acid by the volume in liters to get M (moles/liter).

Here is how to compute the molarity if all you want to do is pretend that the density is 1 g/ml even though it is actually 1.06 g/ml.

Assuming a density of 1 g/ml, 5% by mass equals 5 g/100 g, which is the same as 5 g/100 ml.

50 g/liter x 5 g/100 milliliter

0.8 M is equal to 50 g/liter times 1 mole/60 g, or 0.83 moles/liter.

To know more about Mole concept, visit-https://brainly.com/question/12805690

#SPJ4

Option A and B both are correct answer

What is the Vernier?

Vernier, a Frenchman, invented the vernier calliper in 1631 as a tool for taking extremely precise linear measurements. It employs two graduated scales: the vernier, a specifically graduated auxiliary scale that slides parallel to the main scale and allows readings to be made down to a fraction of a division on the main scale, and a main scale that is comparable to that on a ruler.

Vernier Sizing

The vernier scale takes precise measurements. It contains two scales: a regular, huge scale (the main scale) and a smaller scale inside that is used to accurately compute measurements.

Due to the vernier acuity idea upon which it is built, the vernier scale provides accurate measurement. The misalignment of two line segments is measured by the vernier acuity, a form of visual acuity. Aligned and misaligned lines are easily distinguishable by the human eye.

Vernier Calipers have the following three main applications:

It is employed to gauge a tube's or cylinder's inside diameter.

It is helpful for determining an object's length.

The diameter of circular objects is often measured using a vernier calliper.

Vernier callipers are beneficial for a variety of tasks in addition to these, such as in the industrial sector and for professionals and engineers.

It is used to make wavelength measurements.

it is used to measure the mass of the experimental substance

Therefore both option A and B are correct answer

Learn more about Vernier from given link

https://brainly.com/question/24694454

#SPJ4

Period 3 & Group 2A = Magnesium

Period & Group 7A = Bromine

Period 6 & Group 1A = Cesium

Period 6 & Group SA = Bismuth

Groups - The horizontal row of the periodic table that represents an element's valence electron count.

Periods - The horizontal columns of the periodic table that represent an element's number of electron shells. Families: Compounds with comparable characteristics and the same number of valence electrons.

Learn more about Periodic table here:

https://brainly.com/question/15987580

#SPJ13

N and P pairs of elements would you expect to form a polar covalent bond.

A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two nucleus are concurrently drawing these electrons to them. When the difference between both the electronegativity values of two atoms is too tiny for a transfer of electrons to actually occur to create ions, a covalent bond is formed.

Covalent bonds between atoms in a Lewis structure are shown as a single line connecting the two atoms, which corresponds to the chemical symbol for the element. Diatomic molecules including hydrogen, nitrogen, fluorine, chlorine, bromine, iodine, and astatine are the principal sources of covalent bonding.

To know more about covalent bond visit:

https://brainly.com/question/10777799

#SPJ13

If your job is to test the amount of lead found in paint samples, then you should be specialized in Analytical Chemistry.

Analytical Chemistry is a branch of Chemistry and is a stream of Science that deals with the identification and quantification of various chemical substances in a mixture.

Sometimes the work of the chemists in the field may be related to inventing a new method for testing and identification of a certain chemical or element from a mixture. Their role is usually to perform analysis and interpret a lot by performing the analysis.

It also involves quantitative analysis for determining the numerical amount and concentration of various chemical substances.

So, if you wish to test the amount of lead found in paint samples, you need to focus on Analytical chemistry.

To know more about Analytical Chemistry, click below:

https://brainly.com/question/6945561

#SPJ1

The expected color of each element in a model of a molecule is black, red, blue, and white.

When we observe the model of a molecule in a color-based spectrum then we see different colors as the molecule is made up of different atoms.

So, in the full color-based spectrum, elements of organic carbon show different colors. It appears to be black, blue, red, and green.

However, in the color-based spectrum, carbon is black.

In the gaseous state, oxygen is colorless, however, in liquid form, it appears to have a pale blue color.

Nitrogen makes up a major portion of the atmosphere. The sky color appears to be blue due to nitrogen. Hence, nitrogen is blue. Hydrogen is a white colorless gas.

If you want to learn more about molecules click here:

https://brainly.com/question/26044300

#SPJ4

The complete question is:

Identify the expected color of each element in a model of a molecule.

Carbon

Oxygen

Nitrogen

Hydrogen

Answer:  there are 10 electrons associated with a single Al3+ ion.

Explanation:

Answer: granitic rocks

Explanation: Continental crust is composed of granitic rocks which are made up of relatively lightweight minerals such as quartz and feldspar. By contrast, oceanic crust is composed of basaltic rocks, which are much denser and heavier.

Answer:

Granites

Explanation:

Continental plates are made from different type of granites as well.

:)

The corn starch and water will stay separated and eventually sit in the glass as layers. This is due to the 2 fluids having different densities far enough from one another that the fluids do not mix.

Answer:

Cornstarch and water mixed acts both like a solid and a liquid.

Explanation:

Cornstarch and water is a suspension mixture with a solid dispersed into a liquid. When you press the mixture quickly, the starch molecules close together. This causes the water to get trapped between the starch chains and create a semi-rigid structure.

Balance the equation :

8H₃PO₄  +   24(NH₄)₂MoO₄  +   24HNO₃  ----->  8(NH₄)₃PO₄×24MoO₃  +                                                                                  

                                                                                    24NH₄NO₃+ 24H₂O

The given reaction :

H₃PO₄  +   (NH₄)₂MoO₄  +   HNO₃  ----->  (NH₄)₃PO₄×12MoO₃  +                                                                                  

                                                                                    NH₄NO₃+ H₂O

now sperate the reactant and product and count the no. of each element

Reactant                                    Product

H - 4                                             NH₄ - 4

PO₄ - 1                                          PO₄ - 1

NH₄ - 2                                         Mo - 12

Mo - 1                                            O - 4

O - 4                                             NO₃ - 1

NO₃ - 1                                          H - 2

compare the coefficient ,

multiply 12 to NH₄MoO₄ We get

H₃PO₄  +   12(NH₄)₂MoO₄  +   HNO₃  ----->  (NH₄)₃PO₄×12MoO₃  +                                                                                  

                                                                                    NH₄NO₃+ H₂O

now, we have 24 NH₄ on the left side and 3 on right side, multiply 8 we get

H₃PO₄  +   12(NH₄)₂MoO₄  +   HNO₃  ----->  8(NH₄)₃PO₄×12MoO₃  +                                                                                  

                                                                                    NH₄NO₃+ H₂O

now look at PO₄ , we have 1 on left side and 8 on right side , multiply 8 in H₃PO₄, and compare coefficient, we get

8H₃PO₄  +   24(NH₄)₂MoO₄  +   24HNO₃  ----->  8(NH₄)₃PO₄×12MoO₃  +                                                                                  

                                                                                    24NH₄NO₃+ 24H₂O

now compare the coefficient , the equation is now balance

Thus, Balance the equation :

8H₃PO₄  +   24(NH₄)₂MoO₄  +   24HNO₃  ----->  8(NH₄)₃PO₄×24MoO₃  +                                                                                  

                                                                                    24NH₄NO₃+ 24H₂O

To learn more about balance equation here

https://brainly.com/question/23436095

#SPJ1

The amount of heat needed to completely evaporate a 40 gram sample of propane at its boiling temperature of 230K is 14,420 joules of heat.

The heat of vaporization of a substance is the amount of heat required to change a unit mass of a liquid substance to vapor at its boiling point.

The heat of vaporization of propane is given as 356 Joules per gram.

This means that 1 gram of liquid propane requires 356 joules of heat to be converted to vapor.

Hence, the amount of heat required to convert a 40 gram sample of propane to vapor will be:

Heat required = 40 gram * 356 Joules per gram

Heat required = 14,420 joules of heat.

Learn more about the heat of vaporization at: https://brainly.com/question/13776849

#SPJ1

A chemistry graduate student combines 3.90 grams of potassium and 12.7 grams of iodine to form potassium iodide. according to the law of conservation of mass, potassium iodide should be formed after the reaction is complete is 16.70 g.

According to the law of conservation mass, in a chemical reaction mass can neither be created nor destroyed.

According to the law, mass of the reactant is always equal to the mass of product, because in a chemical reaction, mass can neither be created nor destroyed.

The balanced chemical reaction is -

2 K      +       I₂    →      2 KI

3.90 g  +   12.7 g   =   16.70 g

16.70 g                  =   16.70 g

Therefore, when the reaction proceeds to completion, 16.70 g product is obtained as the sum of reactants is 16.70 g and according to law of conservation of mass, mass is neither created nor destroyed but it only converts from one form to another form.

Hence, potassium iodide formed is 16.70 g.

To learn more about potassium iodide,

brainly.com/question/2071182

#SPJ1

A resting neuron is 4-5 times more permeable to potassium ions i.e K+ as there is a large number of open channels for the passage of ions.

At a normal resting period, the membrane is highly permeable to potassium ions (K+) because sodium ions are expelled out from the cells and potassium ions are forced inward the cell.

At this moment, the sodium-potassium gradient pump operates efficiently in order to exchange potassium inward and sodium outward the cell creating a potential gradient across the cell membrane. Moreover, in this case, the value of resting permeability of potassium ions is 1 as compared to sodium ions i.e. 0.4 much lower than potassium.

If you want to learn more about potassium ions click here:

https://brainly.com/question/12578279

#SPJ4

Answer: 3168.92 kJ

Hope this helps!

The volume of this sample at 760 mm Hg and 37°C is 474.92 mL.

We know that,

PV = nRT, the fundamental law of ideal gas.

Where P is the gas's pressure in atmospheres.

The gas's volume in L is denoted by V.

n is the number of moles of the gas in a mole.

The general gas constant is R.

The gas's temperature is T in Kelvins.

If n is constant and (P, V, and T) have two different values:

P1V1T2 = P2V2T1

P1 is 740 mmHg, V1 is 450 mL, and T1 is 16 °C plus 273 K.

P2 equals 760 mmHg, V2 is??? mL, and T2 is 37 °C plus 273 K, or 310 K.

V2 = P1V1T2/P2T1 = (740 mmHg), 450 mL, 310 K), and 760 mmHg, 286 K) = 474.92 mL, respectively.

To learn more about it, refer

https://brainly.com/question/20348074

#SPJ9

The limiting reagent is oxygen .

The mass of carbon dioxide produced is 2.9612g.

What is limiting agent ?

When a chemical reaction is complete, the limiting reagent—also known as the limiting reactant or limiting agent—is the reactant that has been completely consumed.

Ethane, often known as ethylene, is an unsaturated carbon molecule made up of two carbon atoms. Ethylene is burned in the presence of oxygen during the combustion reaction, producing carbon dioxide and water as byproducts.

Complete response:

Hydrocarbons are burned when they come into contact with oxygen, which causes a chemical reaction that produces carbon dioxide and water. The following is a representation of the balanced chemical equation for ethylene combustion:

C2H4+3O2→2CO2+2H2O

According to stoichiometric coefficients, one mole of ethylene produces two moles of carbon dioxide gas and two moles of water vapour for every mole of oxygen that is used.

Ethylene and oxygen therefore react at a 1:3 ratio.

The ratio of their masses to their molar masses can be used to calculate the amount of moles of ethylene and oxygen.

given mass = n

in molar mass

The number of ethylene moles is:

n(C2H4)=4.95g28gmol−1=0.177

The formula for oxygen moles is n(O2)=3.25g32gmol1=0.101

A reactant that is less prevalent and is consumed earlier in the reaction is the limiting reagent.

Although there is less oxygen available for the reaction, 0.1773=0.531g of oxygen is required to maintain a 1:3 ratio between ethylene and oxygen. So, the limiting reagent is oxygen.

The amount of limiting reagents will determine how the reaction proceeds since once they are used up, the reaction ceases.

As a result, the ratio of oxygen reacting and carbon dioxide being created is 3:2, resulting in the formation of two-thirds (23) of a mole of carbon dioxide for every mole of oxygen.

As a result, two-thirds more moles of carbon dioxide were created than were used in the reaction of oxygen:

n(CO2)=0.101×(23)=0.0673

By dividing the moles by the molar mass of carbon dioxide, it is possible to determine the mass of carbon dioxide that is created.

n(CO2)=0.0673mol×44gmol−1=2.9612g

Therefore,

(a) oxygen is the limiting reagent and

(b) 2.9612g of carbon dioxide are generated.

Learn more about limiting agent from given link

https://brainly.com/question/26905271

#SPJ4

Answer: Its D

Photons are particles of light and have a wavelength.

Explanation:

i did the quiz

Photons are the particles of light which have a particular wavelength and frequency. Photons are the units of light which contain energy. Thus, the correct option is D.

A photon is a tiny particle which comprises of the waves of electromagnetic radiation. As explained by Maxwell, photons are just electric fields which travels through the space. Photons have no net charge, no resting mass, and can travel at the speed of light.

Photons are the packets of light energy (quantum). These are required for the process of photosynthesis in plants. Plants capture the light energy and convert it into chemical energy which is useable by living organisms.

Therefore, the correct option is D.

Learn more about Photons here:

https://brainly.com/question/20912241

#SPJ2

The correct answer is option B: 7

When the following equation is balanced, the coefficients are 7.

According to the law of conversation of mass, matter is neither created nor destroyed, it only transforms form one phase to another.

First of all, write the unbalanced chemical equation.

N[tex]H_{3}[/tex](g) + [tex]O_{2}[/tex](g) → N[tex]O_{2}[/tex](g) + [tex]H_{2}[/tex]O(g)

Now, split the reaction in half and try to balance the number of atoms on each side of the chemical reaction.

After that add appropriate coefficients to balance the atoms on either side.

In the chemical equation, electron gain and lost must be equal.

At last, to balance the coefficients of all the species, multiply with a whole number or integer.

Now if we choose the following coefficients i.e. 4, 7, 4, 6 on both sides of the equation, we see the equation becomes:

4[tex]NH_{3}[/tex](g) + 7[tex]O_{2}[/tex](g) → 4N[tex]O_{2}[/tex](g) + 6[tex]H_{2}[/tex]O(g)

To verify, always check that the equation has same number of atoms on either side.

If you want to learn more about coefficients click here:

https://brainly.com/question/24881460

#SPJ4

We will prepare the stock solution of 0.5 m CuSO₄  by using the formulae M1V1 = M2V2

1. Prepare 5 ml of 0.1 m

  Use the formulae M1V1 = M2V2

  Where M1 = 0.5 m

              M2 = 0.1 m

              V2 = 5 ml

              V1 = ?

  Put the values

              0.5 × V1 = 0.1 × 5

               V1 = 0.5 / 0.5

                V1 = 1 ml

1 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.1 m CuSO₄  solution

1. Prepare 5 ml of 0.1 m

  Use the formulae M1V1 = M2V2

  Where M1 = 0.5 m

              M2 = 0.1 m

              V2 = 5 ml

              V1 = ?

  Put the values

              0.5 × V1 = 0.1 × 5

               V1 = 0.5 / 0.5

                V1 = 1 ml

1 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.1 m CuSO₄  solution

2. Prepare 5 ml of 0.2 m

  Use the formulae M1V1 = M2V2

  Where M1 = 0.5 m

              M2 = 0.2 m

              V2 = 5 ml

              V1 = ?

  Put the values

              0.5 × V1 = 0.2 × 5

               V1 = 1 / 0.5

                V1 = 2 ml

2 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.2 m CuSO₄  solution

3. Prepare 5 ml of 0.3 m

  Use the formulae M1V1 = M2V2

  Where M1 = 0.5 m

              M2 = 0.3 m

              V2 = 5 ml

              V1 = ?

  Put the values

              0.5 × V1 = 0.3 × 5

               V1 = 1.5 / 0.5

                V1 = 3 ml

3 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.3 m CuSO₄  solution

4. Prepare 5 ml of 0.4 m

  Use the formulae M1V1 = M2V2

  Where M1 = 0.5 m

              M2 = 0.4 m

              V2 = 5 ml

              V1 = ?

  Put the values

              0.5 × V1 = 0.4 × 5

               V1 = 2 / 0.5

                V1 = 4 ml

4 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.4 m CuSO₄  solution

5. Prepare 5 ml of 0.5 m

   The stock solution is already a 0.5 m solution so no need for any addition.

You can also get help with stock solutions from the following question:

https://brainly.com/question/21323871

#SPJ4

The percent yield of the reaction  is  28.60 %

The first step for this problem is to convert the given 10.0 grams of NaCl to moles using the molar mass of NaCl:

9.65 g of NaCl = 9.65/58.5

                        = 0.165 moles of NaCl

Next, we look at the balanced reaction equation and determine how many moles of NaHCO3 we could potentially make without 0.165  moles of NaCl (this is called the "theoretical yield"):

0.165 moles NaCl × 1 mol NaHCO₃/1 mol NaCl

                            = 0.165 moles of NaHCO₃

Next, we convert the 0.165  moles of NaHCO3 theoretical yield to grams so that we can compare this to our "actual yield" of 4.11 grams:

0.165 moles of NaHCO₃ × 84 gtrams/1 mole

                        = 13.86 grams of  NaHCO₃

Finally, we compare our theoretical yield of 13.86 grams to our actual yield of 4.11 grams and multiply by 100 to get our percent yield:

4.11 grams / 14.37 grams × 100 = 28.60 %

Learn more about percent yield here:-https://brainly.com/question/25996347

#SPJ4

These three variables have a common equation:

[tex]D=\dfrac{m}{V}[/tex]

We're given:

Isolate m in the equation:

[tex]m=DV[/tex]

Plug these values into the equation:

[tex]m=(3.62\frac{g}{cm^3})(4.00 cm^{3})\\\\m=14.48g[/tex]

The mass of the sample of barium is 14.48 g.

Name of Pb(NO3 )2 is Lead(II) nitrate.

Pb(NO3)2 is ionic as well as covalent

Pb is the symbol of lead and NO3  is a complex ion called nitrate. It has one nitrogen and three oxygens. Pb(NO3)2 is ionic as well as covalent. NO3 is covalent in nature because both nitrogen and oxygen are non-metals and therefore an ionic bond cannot be formed between them.

Ionic compounds are formed when a metal reacts with a nonmetal whereas covalent compounds are formed when two non -metals react with each other. Binary compounds containing hydrogen are usually covalent compounds as hydrogen is a non - metal.

An ionic bond  donates an electron to the other atom in the bond whereas electrons in a covalent bond are shared equally between the atoms.

To know more about bond types, refer

https://brainly.com/question/2234173

#SPJ13

The book shelf will move to the right with a force of 4 newton when george is trying to move a heavy bookshelf across the classroom.

To know more about friction visit:

https://brainly.com/question/13000653

#SPJ10

Answer: I think the answer is B

I Hope this will Help You:-

Organisms need to detect and respond to changes in their internal and external environment. This is because the conditions inside our body must be carefully controlled for it to function effectively and survive. The control systems that allow organisms to respond to changes are incredibly important.

The third ball of 5 grams of mass will make the biggest crater in the sand because force is directly proportional to mass. so the greeter the mass, the greater its force and impact.

Mass is described as the quantity of matter in a physical body.

Mass is also a measure of the body's inertia, the resistance to acceleration when a net force is applied.

Mass is always known to be constant for a body. We can calculate mass by:

Mass = volume × density.

Weight is the measure of the gravitational force acting on a mass. The SI unit of mass is the "kilogram"

Learn more about mass at: https://brainly.com/question/19385703

#SPJ1

The expansion of plasma—a clump of charged particles—from the sun corona produces the solar wind (outermost atmosphere).

The solar wind is a stream of energetic, charged particles, principally protons and electrons, traveling across the solar system from the Sun at speeds of up to 900 km/s and a temperature of one million degrees (Celsius). It is created from plasma.

A stream of powerful particles that the Sun ejects is known as the solar wind. These include the hydrogen electrons and protons as well as atomic nuclei such as helium, collectively known as alpha particles. Additionally, "heavy ions" and the atomic nuclei of carbon, nitrogen, oxygen, neon, and magnesium can be found in trace amounts.

TO know more about solar wind visit:

https://brainly.com/question/12851667

#SPJ10

To convert the salts of organic acids back into their original form you have to alter the pH of solution.

pH is a numerical indicator of how acidic or basic aqueous or other liquid solutions . The phrase, which is frequently used in chemistry, biology, and agronomy, converts the hydrogen ion concentration, which typically ranges between 1 and 1014 gram-equivalents per liter, into numbers between 0 and 14.

pH is an important quantity that reflects the chemical conditions of a solution. The pH can control the availability of nutrients, biological functions, microbial activity, and the behavior of chemicals.

You may do this by including a mineral base, such sodium hydroxide. The proton will be eliminated by the mineral base, leaving the original organic molecule. The organic component has lost its charge and is no longer as soluble in water.

Thus, to convert the salts of organic acids back into their original form you have to alter the pH of solution.

To learn more about pH follow the link below;

https://brainly.com/question/491373

#SPJ12