Consider an element `""_(15^(31)X` and answer the following questions
To which period does it belong?

Explanation

To determine the period to which the element \( _{15}^{31}X \) belongs, we will follow these steps:

### Step 1: Identify the Atomic Number
The notation \( _{15}^{31}X \) indicates that the atomic number of the element \( X \) is 15. This means it has 15 protons and, in a neutral atom, also 15 electrons.

### Step 2: Write the Electronic Configuration
To find the electronic configuration of the element, we need to distribute the 15 electrons into the available shells:
- The first shell (K shell) can hold a maximum of 2 electrons.
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