Question

the electronic configuration of an electron is 2,8,7. what will be its valency?

Answer 1

Answer:

Here in valence shell we have 7 electrons in which 2 are in s orbital and 5 are in p orbital in which 1 is unpaired. Hence valency electrons is 7 for atomic number 17 that is chlorine and valency is 1 as it has to get one electron to get octet configuration.

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Answer 2

Answer:

its valency will be 1

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