Question

Choose the correct sequence by arranging the given ions in the order of increasing size :
A. $Cl^-$
B. $Mg^{2+}$
C. $Br^-$
D. $S^{2-}$
E. $Na^+$
Choose the correct answer from the options given below :

• A. A < D < C < B < E
• B. B < E < C < A < D
• C. B < E < A < D < C
• D. E < B < C < A < D

Hint:

When comparing atomic or ionic sizes, rule #1 is the number of shells (period number on the periodic table). Rule #2 is for isoelectronic series: the more highly positive the charge (or the less negative), the smaller the ion, due to a stronger pull by the protons.

Answer 1

The Correct Option is C