Giving appropriate examples (at least three), explain how the reactivity of a metal is related to its mode of occurrence in nature.

Explanation

To answer the question regarding how the reactivity of a metal is related to its mode of occurrence in nature, we can break it down into several steps, providing examples for clarity.

### Step-by-Step Solution:

1. **Understanding Reactivity Series**:
- The reactivity series is a list of metals arranged in order of decreasing reactivity. Metals at the top are more reactive, while those at the bottom are less reactive.
- For example, potassium (K), sodium (Na), and calcium (Ca) are highly reactive metals, while gold (Au) and platinum (Pt) are among the least reactive.

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