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The atomic number of Na and Mg is 11 and...

The atomic number of Na and Mg is 11 and 12 respectively and they belong to the same period.
a) Which one would have smaller atomic size.
b) Which one would be more electropositive.
c) To which group would each one belong.

Text Solution

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a) Mg has smaller atomic size due to high nuclear charge (`Na to 2,8,1, Mg to 2.8.2`)
b) Na would be more electropositive because it can lose the valance electron more easily
c) Na belongs to group 1 and Mg belong to group 2 as Na contains 1 and My contains 2 valence electron.
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