Question

Which one of the following properties of an element is not variable

• A. Valency
• B. Atomic weight
• C. Equivalent weight
• D. All of these

Answer 1

Answer: (B)

Atomic weight

Answer 2

Valency of an element can change depending on the compound it forms. Equivalent weight is calculated using atomic weight and valency, so if valency changes, equivalent weight also changes. Atomic weight, which is the weighted average mass of isotopes, is a fundamental property of an element and is considered constant for a given element.