Give one example of eacha) metal having valency 2.
b.non metal having valency 2.
c.element with completely filled outermost shell.
d.d) element with three shells, having 4 electrons in the outermost shell.
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a) Magnesium
b) Oxygen
c) Neon,Argon,Xenon,Krypton
d) Silicon
b) Oxygen
c) Neon,Argon,Xenon,Krypton
d) Silicon
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Answer:
a) Magnesium/Calcium
b)Oxygen/Sulphur
c) Helium/Neon/Argon
d)Silicon only
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