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The number of electrons in the outermost L shell of an atom is 5. (a) Write its electronic configuration. (b) What is its valency and why?
CBSE Class 9
CBSE Class 9 Science
prasanna
June 30, 2016, 4:20am
1
(a) 2,5
(b) 3, because it needs three more electrons to complete its octet.