Why do alpha particles have a high ionising power?

Explanation

### Step-by-Step Solution:

1. **Understanding Alpha Particles**:
Alpha particles are composed of 2 protons and 2 neutrons, making them identical to helium nuclei. They are denoted by the symbol \( \alpha \).

2. **Charge of Alpha Particles**:
Alpha particles carry a double positive charge (+2). This is significant because charged particles interact with matter through electromagnetic forces.

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