What are irons?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Ions:**
- Ions are defined as atoms or groups of atoms that carry an overall positive or negative charge. This charge arises when the number of electrons does not equal the number of protons in an atom.

2. **Understanding Charge:**
- In a neutral atom, the number of protons (positively charged) is equal to the number of electrons (negatively charged), resulting in no overall charge. However, when an atom gains or loses electrons, it becomes charged.

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