First slide

Atoms; molecules and matter

Question

Which property of an element is not variable?

Moderate

A

Valence
B

Atomic mass
C

Equivalent mass
D

None of these

Solution

Valence of an element is variable say it is 2 and 3 in FeCl₂ and FeCl₂ respectively
$Also, equivalent mass = \frac{atomic mass}{valence} and thus, it is also variable.$
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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