Question

A negatively charged atom or group of atoms is called a(n) _____. anion anode cation cathode

Answer 1

An anion.   

These group of atoms because they are negatively charged migrate to the anode (positive terminal) of an electrolytic process.

Answer 2

Answer: Option (a) is the correct answer.

Explanation:

When electrons are removed from a neutral atom or ion then the atom attains a positive charge. Therefore, it is called a cation.

For example, $Na^{+}$ is a cation.

Whereas when electrons are added to a neutral atom or ion the then the atom attains a negative charge. Therefore, it is called an anion.

For example, $Cl^{-}$ is an anion.

Anode is a positively charged electrode and cathode is a negatively charged electrode.

Thus, we can conclude that a negatively charged atom or group of atoms is called an anion.