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.
`""_(61)C`

Explanation

To solve the question regarding the element with atomic number 61 (which is Promethium, denoted as Pm), we will follow these steps:

### Step 1: Write the Electronic Configuration
The electronic configuration of an element describes how the electrons are distributed in the atomic orbitals. For Promethium (Pm), with atomic number 61, the electronic configuration can be derived as follows:

1. Fill the orbitals in the order of increasing energy levels:
- 1s²
- 2s²
...