1.

An element 'M' has an atomic number 9 and its atomic mass 19. The ion of M will be represented by

A.  M
B.  \[{{M}^{2+}}\]
C.  \[{{M}^{-}}\]        
D.      \[{{M}^{2-}}\]
Answer» D.      \[{{M}^{2-}}\]


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