Determine if each of the following statements is true or false.

Question

Determine if each of the following statements is true or false. 

1) An anion has a smaller radius than the atom due to the removal of electrons. ______

2) A Ca²⁺ ion has a smaller radius than a Ca atom. ______ 

Answer 1

1) Am anion is larger than the neutral atom because an anion is formed by adding electron / electrons to neutral atom so due to electron repulsions and decrease in effective nuclear charge, the anions are larger than the atom

2) This statement is true because a cation is formed by removing one or more electrons so the effective nuclear charge on the remaining electrons increases resulting in a smaller size of the cation.

Answer 2

1. An anion is a negative ion. Negative ions are formed by gaining electrons making anions larger than the atom they were formed from. Therefore, this statement is false.
2. The Ca+2 ion is a cation. It is formed by the loss of electrons making the ion smaller than the Ca atom it was formed from. This statement is true.