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An element 'M' has atomic number 12.
(a) Write its electronic configuration.
(b) State the group to which 'M' belongs.
(c) Is 'M' a metal or a non-metal?
(d) Write the formula of its oxide.
(a) The electronic configuration of M (atomic no. 12) is 2, 8, 2.
(b) As M has 2 valence electrons, hence, it belongs to the 2nd group.
(c) M is metal as it has 2 valence electrons.
(d) The formula of its oxide is MO, as both oxygen and M have a valency of 2.
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