Question

An element $M$ has an atomic mass $19$ and atomic number $9$. Its ion is represented by

• A. $M^{+}$
• B. $M^{-}$
• C. $M^{2+}$
• D. $M^{2-}$

Answer 1

Answer: (B)

$M^{-}$ After gaining an $e^{-}$ the metal attains stable configuration