Question

what is valency?
what is a molecule?
what is an ion?​

Answer 1

Those atoms molecules or compounds which lose of gain electron than they becomes ion. E. G anion and cation

Answer 2

Answer:

1 valency= a measurement of the atom to combine with others by he number of hydrogen atoms it can combine or can take place of

2 molecule = a smallest unit in which the substance can be divided without changing it's chemical nature

3 ion = an atom or a molecule that can gain or lost one or more of it's part (electron)

and so has a positive or negative electric charge

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