Which period and group of the periodic table does an element with atomic number 4 belong to?

Explanation

To determine the period and group of the element with atomic number 4, follow these steps:

### Step 1: Identify the Element
The atomic number 4 corresponds to the element Beryllium (Be).

### Step 2: Write the Electronic Configuration
The electronic configuration of Beryllium can be written as:
- 1s² 2s²
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