Atomic number of an element is 42. Find out the number of electrons present in the valence shell.

Explanation

To find the number of electrons present in the valence shell of an element with an atomic number of 42, we can follow these steps:

### Step 1: Understand the Atomic Number
The atomic number of an element indicates the number of protons and, in a neutral atom, also the number of electrons. For this element, the atomic number is 42, which means it has 42 electrons.

### Step 2: Determine Electron Configuration
Electrons are arranged in different energy levels or shells around the nucleus. The shells are labeled K, L, M, N, etc. The maximum number of electrons that can fit in each shell is as follows:
- K shell: 2 electrons
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