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2015-11-03T19:21:30+05:30

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If atomic number Z is 5 then electronic configuration is (2,3) and valency is 3.
1 4 1
2015-11-03T19:30:00+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
If the atomic number of z is 5 then its electronic configuration is 2,3 and then it will give its 3 electrons as it cannot take 5 electron from any atom so its valancy will be +3 or simply 3
2 5 2