Problem: Which element has the smallest ionic radius?a. Na+ or Mg2+b. Be2+ or O2-c. F‾ or S2-

FREE Expert Solution

Recall that ionic radius is the size of an ion. The trend for ionic radius is as follows: it increases from right to left and down a period in the periodic table. Ionic radius also increases with an increasing number of electrons.


Na+ or Mg2+: For an isoelectronic series, the ionic radius will just depend on the charge of the ion: the more positive the charge of an ion is, the smaller the ion is.


–3 > –2 > –1 > 0 > +1 > +2 > +3

79% (415 ratings)
View Complete Written Solution
Problem Details

Which element has the smallest ionic radius?

a. Na+ or Mg2+

b. Be2+ or O2-

c. F or S2-

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Ionic Radius concept. You can view video lessons to learn Periodic Trend: Ionic Radius. Or if you need more Periodic Trend: Ionic Radius practice, you can also practice Periodic Trend: Ionic Radius practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Brown's class at TAMU.