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how to find valency of a compound using atomic number

how to find valency of a compound using atomic number
 

Grade:9

1 Answers

kuntal nath
19 Points
5 years ago
first fill up the octet with that atomic number and and see what more number of electrons exceed 8 or less than 8. for example atomic number of sodiam is 11 arranging in octet 2,8,1 and valency is 1

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