Which of the following statements is/are TRUE?

Question

Which of the following statements is/are TRUE?

 

Group of answer choices:

-Mg atom is larger than Be atom.

-An Mg²⁺ ion has a larger radius than an Mg atom.

-An I⁻ ion has a larger radius than an I atom.

-N^3- and N⁵⁺ ions have the same radius as an N atom.

Answer 1

The periodic trend for atomic radius is that atoms get larger going from right to left within a period and they get larger going from top to bottom within a group. Cations (+) are smaller than their neutral atom and anions (-) are larger than their neutral atom. See if you can use these criteria to find the correct answer. Example: Mg is in same group as Be but is below it, so Mg is larger than Be.