an element X has mass number 24 and neutrons 12 calculate valency of the element
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Mass no = 24
Atomic no.=12
2,8,2
Valency =2
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if the mass no is 24, atomic no = mass no - neutrons.atomic no=24-12=12,so nearest Nobel gas is neon 10. valency=12-10=2
ayushi58957:
why it is neon
because it is the noble gas
noble gases are helium-2,neon-10,argon-18,krypton-36,xenon-54,radon-86
okkk
OK thanks
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