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, we will follow these steps:

### Step 1: Determine the Atomic Number
The atomic number of the element given is 40, which corresponds to the element Zirconium (Zr).

### Step 2: Write the Electronic Configuration
To write the electronic configuration of Zirconium (Zr), we fill the orbitals in the order of increasing energy levels according to the Aufbau principle. The electronic configuration is as follows:

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