Chemistry, asked by Rajshree525, 5 months ago

please answer this question fastely

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Answered by kevalshah1330

0

Answer:

ok

Explanation:

17Cl is a correct answer.

Answered by nabanitamaji84

0

4Be

Explanation:

because period is 2⅖r=⁵⁶7(⅞⁸)

so, period is 4be

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