can u please explain that
how the valency of
3. Lithium
4. Beryllium
5. Boron
can be found by "electronic configuration"
i mean...if there's 1 electron in the second shell of lithium.. why's the valency is 1 ?
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valency of an element is the electron in the last shell if it is a metal
by the way it's belieber here
please follow and thank my other answers plzz
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