In the reaction between magnesium and sulfur, the magnesium atoms
select one:
a. become anions
b. become cations
c. become part of polyatomic ions
d. share electrons with sulfur
e. crystallize

b. become cations

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

In , magnesium is having an oxidation state of +2 called as cation and sulphur is having an oxidation state of  -2 called as anion.

Electronic configuration of magnesium:

Magnesium atom will loose two electrons to gain noble gas configuration and form

Electronic configuration of sulphur

Sulphur atom will gain one electron to gain noble gas configuration and form sulphide ion with -2 charge.

Thus In the reaction between magnesium and sulfur, the magnesium atoms become cations.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it