Question

The electronic configuration of an element X is 2, 8, 7.

Element X will show its properties similar to which element-N or F?

Answer 1

Step-1: Introduction

The elements in periodic table are placed in periods and groups. Periods are horizontal rows that has increasing atomic numbers. Groups are vertical columns. The groups have similar chemical properties. There are 7 periods and 18 groups in periodic table.

Step-2: To find the atomic number

The elements are classified on the basis of electronic configuration. The atomic number of an element gives the number of protons in the nucleus of the element.

Atomic number of the element = 2+8+7 = 17.

The element with atomic number 17 is Chlorine ($\mathrm{Cl}$).

Step-3: Similar property of X

The elements Chlorine ($\mathrm{Cl}$) and Fluorine ($\mathrm{F}$) belongs to group 17. They both have similar property due to the presence of same number of valence electrons.

So, Element X will show its properties similar to $\mathrm{F}$.