Why compounds shows colours in flame test ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Flame Test**: The flame test is a qualitative analysis technique used to identify the presence of certain metal ions based on the color they emit when heated in a flame.

2. **Heating the Compound**: When a compound is subjected to heat in a flame, the energy from the flame is absorbed by the electrons in the compound.

3. **Electron Excitation**: The absorbed energy causes the electrons to gain energy and jump to higher energy levels or excited states. These higher energy levels are often referred to as "empty orbitals."

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