Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. An element $M$ has an atomic mass of $19$ and atomic number $9$, its ions is represented by

ManipalManipal 2011Classification of Elements and Periodicity in Properties

Solution:

Configuration of an element ${ }_{9} M=1 s^{2},\, 2 s^{2},\, 2 p^{5}$.
Hence, its ion will be $M ^{-}$ because it can easily gain one electron to have octet.