Science, asked by ansh12345643, 1 year ago

please help me in this question

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Answered by drushasangwan

0

A )

1 K

2 Be and Ca

2nd line is not clear

Please send again

B) through electronic configuration we can determine the number of Valence Electrons which can give the valency of that element

Valency of the element having atomic number 9 is 1

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