Question

Elements A, B and C have atomic numbers $17,19$ and $10$ respectively. State which one is: ​

(iii) chemically Inert​

Answer 1

Electronic configuration of element C (atomic number $=10$) is $2,8$. So it is a stable element, it will neither lose nor accept electrons. Therefore, C is chemically inert.​

Additional information: ​

The atoms of noble gases already have complete outer shells, so the noble gases are chemically inert and do not take part in chemical reactions.​