State wheather the following statement a...

State wheather the following statement are true or false.
(i)One mole of methane has four H atoms.
(ii) The isotopes of an element differ in the number of electrons.
(iii)The elelment are identified by their atomic numbers.
(iv) The mass number of an element has specific units.
(v) The K shell of an element cannot have more than eight electrons.

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