Question

Give two examples for each group.

1. Zero group elements

Answer 1

Modern periodic table:

• The modern periodic table is an arrangement of all the elements known in accordance with their increasing atomic number and recurring chemical properties.
• It is a tabular display of 118 chemical elements which consists of horizontal rows called periods and vertical columns are called groups.
• All elements in a group have the same number of valance electrons, and in period elements have the same number of electron shells.
• There are seven periods and eighteen groups in the modern periodic table.

Group 8A:

• This group is of Nobel gases.
• They occupy the eighteenth group of the periodic table.
• They are non-reactive gases as their valance shell is completely filled.
• Two examples of noble gases or inert gases are Helium ($\mathrm{He}$), and Neon ($\mathrm{Ne}$).