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Nuclei — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsNuclei1 Mark
MCQ
Which of the following property of an element never changes?
  • A
    Valency
  • ✓
    Atomic weight
  • C
    Both $A$ and $B$
  • D
    None of the above
✓

Answer

Correct option: B.
Atomic weight

The atomic weight is a characteristic property of an element and can never vary.
The valency of an element can vary. For example, when the ion is in $+2$ and $+3$ oxidation state, its valency is $2$ and $3$ respectively.

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