Q. 204.5( 6 Votes )
An element A on c
(a) O8 = 2, 6
Since valency of oxygen is 2 and element A produces oxide A2O (i.e two atoms of element A and one atom O are present in A2O molecule) so 1 electron must be present in the outermost shell of element A.
(b) Since element A contain 1 electron in outermost shell so it belongs to 1 group.
(c)Since it has 1 electron in outermost shell so it will donate this electron to acquire noble gas electronic configuration. Hence it is metal.
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