Question

State the electronic configuration of ${}_{20}{}^{}\mathrm{F}$and state whether it is metal, non metal or inert gas.

Answer 1

• The atomic number is given as 20.Hence it will have 20 electrons as well.
• Thus electronic configuration:2,8,8,2.
• Since F is having 2 electrons in the valence shell, it is a metal.
• Metals will generally have 1 to 3 valence electrons.They can lose these electrons easily and attain stable electronic configuration.
• Th element with atomic number 20 is calcium, which is an alkaline earth metal.