An element X has a total of 31 nucleons, out of which 16 are neutrons.
Write the electronic configuration of an atom of element X

Explanation

To determine the electronic configuration of element X, we will follow these steps:

### Step 1: Identify the Mass Number and Neutrons
The problem states that element X has a total of 31 nucleons (mass number) and 16 neutrons.

### Step 2: Calculate the Number of Protons
The mass number (A) is the sum of the number of protons (Z) and neutrons (N):
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