Correct Answer - Option 2 : Valency of an element
Concept
Size of element:
- The atomic size of an element is determined by the atomic radius of an element.
- Atomic radius is the distance between the center of an atom to its outermost (valence) shell having electrons.
- The atomic size of any element is mentioned in form of Atomic radius.
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Unit of Atomic radius is Amstrong (Ao).
Valency of an element:
- Valency is the combining capacity of an atom of an element.
- It is otherwise the valence electrons an atom uses to form a chemical bond.
The molar mass of the element:
- It is defined as the mass of one atom of an element.
- The unit is g/mol.
- For all substances, the molar mass of in g/mol is numerically equal to the formula mass in atomic mass units.
Explanation:
- The maximum number of univalent atoms that may combine with an atom of the element is the Valency.
- The valency of an element is always an integer.
- With regard to covalent compounds, the term valency describes the number of bonds usually formed by each element.
- In ionic compounds, often, the number of positive or negative charges that appear on the atom in its ion helps to state its valency.
- The chemical behavior is largely influenced by the valency of the element.
Hence, Valency of an element is the property that determines an element's chemical behavior.
