Question

✏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 ?

[ Class 10 ]

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Answer 1

Answer:

a) Mg has smaller atomic size due to high nuclear charge (Na → 2, 8, 1; Mg → 2, 8, 2)

b)Na would be more electro positive 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 Mg contains 2 valence electron.

Explanation:

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Answer 2

Answer:

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⫸Mg has the smaller atomic size

⫸Na is more electropositive

⫸Na belongs to 1st group and Mg belongs to second group

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