Write the electronic configuration of the elements given below and predict their period, group, block and also name the class, i.e., representative, transition etc. to which they belong.
`""_(40)B`

Explanation

To solve the question regarding the element with atomic number 40, we will follow these steps:

### Step 1: Write the Electronic Configuration
The atomic number of the element is 40. To write the electronic configuration, we fill the orbitals according to the Aufbau principle, Hund's rule, and the Pauli exclusion principle.

1. Start from the lowest energy level:
- 1s² (2 electrons)
- 2s² (2 electrons)
...