Q. 65.0( 5 Votes )

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Answer :

(a) Since the atomic number given = 13

The Electronic configuration of the element= 2, 8, 3

(b) Group number to which the element ‘X’ belongs = 10 +3 = 13th group.

(c)Since ‘X’ has 3 valence electrons. So, ‘x’ is a metal.

(d) The formula for the bromide can be calculate by cross multiplication of the valences which is as follows:

So, formula of its bromide is XBr3

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