Question

An element X belongs to group 1 and 3 periods.
a)Give it's electronic configuration
b)Formula when it combines with oxygen.
c) State it's nature

Answer 1

The element which belong to first group and third period is sodium it's symbol is Na

a)Electronic configuration :-2,8,1

b)When it combines with oxygen it forms sodium oxide which is Na2O

c)The bond formed is ionic bond as it has happened between one metal and one non metal.

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Answer 2

Hey mate..

As X belongs to group 1,it has 1 Valency.
So 1 valence electron.

Electronic configuration :2,8,1

Formula :X2O


Nature : metal.

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