Question

The ions O2-, F, Na+, Mg2+ and A13+ are isoelectronic, their ionic radii show
a) A significant increase from 02- to A13+
b) A Significant decrease from 02- to A13+
c) An increase from O2-to F and then decrease from Nat to AB+
d) A decrease from 02- to F an then increase from Nat to AB+​

Answer 1

Answer:

ANSWER

As we move along a period, size decreases and as we move down the group size increases so here

Z electron

Na

+

11 10

Mg

2+

12 10

Al

+3

13 10

F

−

9 10

Above are isoelectronic species, hence size ∝

Z

1

So size decreases from O

−2

to Al

+3

.

solution