Sodium is placed in ___ period and group in the periodic table.

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3^rd, 1

2^nd , 2

3^rd, 2

2^nd , 1

answer is A.

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Detailed Solution

Sodium has atomic number 11 and its electronic configuration is 2,8,1. It has three orbits and hence one electron in the outermost shell, hence it is placed in the third period and group 1 in the periodic table.

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