Give the electronic configuration of oxygen. Also mention the period and the group to which the element belongs.

Explanation

To find the electronic configuration of oxygen and identify its period and group, follow these steps:

### Step 1: Determine the Atomic Number of Oxygen
Oxygen has an atomic number of 8. This means it has 8 electrons.

### Step 2: Fill the Electron Shells
- The first shell (K shell) can hold a maximum of 2 electrons. Therefore, we fill the K shell first:
- K shell: 2 electrons
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