Question

What is the fifth symbol on the periodic table?

Answer 1

Periodic table:

• The periodic table is an arrangement of all the elements in accordance with their increasing atomic number and recurring chemical properties.
• There are $118$ elements in the periodic table.
• In the periodic table, there are $18$ groups and $7$ periods.

• The fifth element is Boron $\left(\mathrm{B}\right)$ and it has the atomic number $5$.
• The atomic mass of Boron is $10.81\mathrm{u}$.
• It is a non-metal that belongs to period $2$ and group $13$.
• The electronic configuration of Boron is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^1$ or $\left[\mathrm{He}\right]2{\mathrm{s}}^{2}2{\mathrm{p}}^1$.

Hence, the fifth symbol of the periodic table is $\mathbf{B}$.