Question

How many electrons should be present in the outermost shell of an atom so that it behaves like a non metal?

Answer 1

Non-metal:

• Non-metals are those elements that have a tendency to gain electrons and form anion is considered a non-metal
• Generally, 4,5,6,7 electrons are involved in the outermost shell of non-metal
• They are non-malleable, non-ductile, non-sonorous, non-lustrous, and have a low tensile strength.

Example: Fluorine

• Fluorine has atomic number 9 and hence it will have 9 electrons. Thus electronic configuration: 2, 7.
• Now, the Fluorine atom will gain one electron from some other atom to complete an octet and form ${\mathrm{F}}^{-}$