Question

For each of the following pairs, state which one is larger in size: (a) Na, Na+ (b) Be, Mg (c) Br, I (d) Cl, Br

Answer 1

Na is bigger than Na+

Mg>Be

Br<I

Cl<Br

Explanation:

• The size of a atom depends on various factors.
• It is dependent on number of shells which are present in the atom.
• It is also depend on the electronic configuration of the atom or the ion
• Beryllium is bigger in size as compared to magnesium. Similarly iodine is also so bigger in size as compared to bromine. Chlorine is smaller as compared to bromine.
• In case of sodium when the sodium atom loses an electron the number of electron decreases and as a result electron suffer attraction from the centrally placed nucleus of the atom and as a result the size of the mono positive sodium Ion decreases.

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