Question

(i) How we can determine the valency of the following elements

(a) Oxygen (b) Magnesium (c) Neon.


(ii) Identify the type of ion produced by each atom for stability.

Plz help

Answer 1

Answer:

By seeing the number of atoms in the valence shell

Explanation:

a) Oxygen

Atomic number = 8

Valence electrons = 6

Therefore it requires 2 electrons to complete its valence shell .

Therefore valency is -2 and it is an anion.

b) Magnesium

Atomic number = 12

Therefore it needs to lose 2 electrons to complete its valence shell .

Therefore valency is +2 and it is an cation.

c) Neon

Atomic number = 10

Therefore its valence shell is full and thus requires no electrons and it's valency is 0.

Answer 2

Answer:

By seeing the number of atoms in the valence shell

Explanation:

a) Oxygen

Atomic number = 8

Valence electrons = 6

Therefore it requires 2 electrons to complete its valence shell .

Therefore valency is -2 and it is an anion.

b) Magnesium

Atomic number = 12

Therefore it needs to lose 2 electrons to complete its valence shell .

Therefore valency is +2 and it is an cation.

c) Neon

Atomic number = 10

Therefore its valence shell is full and thus requires no electrons and it's valency is 0.