An atom of an element has two electrons in the valence shell and two consecutive inner shells have 8 electrons each. Calculate the atomic number of the element.

Options

A. 19
B. 20
C. 30
D. 18

Explanation

To solve the problem, we need to determine the atomic number of an element based on the given information about its electron configuration.

### Step-by-Step Solution:

1. **Identify the Electron Configuration**:
- The problem states that the atom has **2 electrons in the valence shell** and **two consecutive inner shells** each containing **8 electrons**.
- We can denote the shells as follows:
- K shell (1st shell) - can hold a maximum of 2 electrons.
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