Question

Valency of an element with atomic number z=18

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Answer 1

Atomic number z = 18

Mass number A = 40

electronic configuration is 2,8,8

Valency is 8 - 8 which is 0

Answer 2

Answer:

0

Explanation:

element having atomic number 18 is argon which is a noble gas so they are king of themselves having complete octates no need to gain electrons anymoreshow their valency to gain electrons zero as their outermost shell or valence shell is full