Chemistry, asked by Rajshree525, 1 month 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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