Find the name of elements based on the electronic configuration : 2,8,7

Explanation

To find the name of the element based on the electronic configuration 2,8,7, follow these steps:

### Step-by-Step Solution:

1. **Understand Electronic Configuration**: The electronic configuration given is 2,8,7. This means that the element has:
- 2 electrons in the first shell
- 8 electrons in the second shell
- 7 electrons in the third shell
...