Variable valency is shown by
(1) \( \mathrm{Na} \)
(2) \( \mathrm{C...
Variable valency is shown by
(1) \( \mathrm{Na} \)
(2) \( \mathrm{Cu} \)
\( \mathrm{P} \)
(3) \( \mathrm{Mg} \)
(4) \( \mathrm{Al} \)
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