Science, asked by khagendrachetry403, 24 days ago

what is the valency of an element x having atomic number 19​

Answers

Answered by ravindukoralegedara
1

Answer:

electronic configuration of element X = 2,8,8,1

there is an extra electron allways atoms take there nearest noble gas elecronic configuration ,the nearest noble or inert gas is Argon

elecronic configuration of element Ar=2.,8,8

∴ Element X Valency is 1

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