The particle which is formed by the gain of electrons by an atom is called ___________

Explanation

To answer the question, "The particle which is formed by the gain of electrons by an atom is called ___________," we can follow these steps:

### Step 1: Understand the concept of atoms and electrons
Atoms are the basic units of matter, and they consist of protons, neutrons, and electrons. Electrons are negatively charged particles that orbit the nucleus of an atom.

**Hint:** Remember that atoms can gain or lose electrons, which affects their charge.

### Step 2: Identify what happens when an atom gains electrons
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