Which property of an element is not variable?

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Valence

Atomic mass

Equivalent mass

None of these

answer is B.

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Detailed Solution

Valence of an element is variable say it is 2 and 3 in FeCl2 and FeCl2 respectively Also, equivalent mass = atomic mass valence and thus, it is also variable. Atomic mass of an element is constant as it is the mass of total particles of element (proton, neutron and electron).

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