Lithium atom has atomic mass 6 and has 3 protons in it nucleus. How many neutrons does it have? Write down its electronic configuration.

Explanation

To solve the question regarding the lithium atom, we will follow these steps:

### Step 1: Calculate the number of neutrons
The number of neutrons in an atom can be calculated using the formula:
\[ \text{Number of Neutrons} = \text{Atomic Mass} - \text{Number of Protons} \]

Given:
- Atomic Mass of Lithium = 6
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