Question

What is the total number of elements in period 2 of the periodic table?

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: Period 2 elements

Period 2 elements include Beryllium ($\mathrm{Be}$), Carbon ($\mathrm{C}$), Nitrogen ($\mathrm{N}$), Boron ($\mathrm{B}$), Lithium ($\mathrm{Li}$), Fluorine ($\mathrm{F}$), Oxygen ($\mathrm{O}$) and Neon ($\mathrm{Ne}$).So, this period have eight elements.

Only K-shell and L-shell electrons are filled by the elements in period 2. This is also called a short period.

So, the total number of elements present in period 2 is eight.