Which describes a step in the process of forming an ionic bond?

a.) a metal atom loses electrons and becomes a positive ion.

b.) a metal atom gains electrons and becomes a negative ion.

c.) a nonmetal atom loses electrons and becomes a negative ion.

d.) a nonmetal atom gains electrons and becomes a positive ion.

Option (A) is the correct answer.

Explanation:

A bond formed by donating electrons from one atom to another then the bond formed is known as ionic bond.

For example, sodium has one extra electron as its electronic configuration os 2, 8, 1 and chlorine has shortage of one electrons as chlorine's electronic configuration is 2, 8, 7.

So, sodium will donate one electron to chlorine atom and sodium itself will become positively charged ions. Therefore, it will result in the formation of NaCl by forming an ionic bond.

Thus, we can conclude that a metal atom loses electrons and becomes a positive ion describes a step in the process of forming an ionic bond.

The correct answer is 5.0 L

Explanation:

STP are defined as T=273 K and P= 1 atm

By using the ideal gas equation, we can calculate the number of moles (n) of the gas at a volume V=2.5 L:

PV= nRT

⇒n= (PV)/(RT) =(1 atm x 2,5 L)/(0.082 L.atm/K.mol x 273 K)= 0.112 mol

For a sample of argon gas, with the same number of moles (0.112 mol) but twice the temperature (T = 273 K x 2= 546 K):

V= (nRT)/P = (0.112 mol x 0.082 L.atm/K.mol x 546 K)/1 atm = 5.0 L

That is consistent with the fact that when a gas is heated, it expanses. So, if the temperature increases twice, the volume also increases twice.