Question

According to Mendeleev's periodic law, the properties of elements are periodic function of their

• A. atomic number
• B. atomic masses
• C. atomic volumes
• D. atomic sizes

Answer 1

The correct option is B

atomic masses

Explanation for correct option:

(B) Atomic masses

Characteristics of Mendeleev's Periodic Law :

• As per this law, the atomic mass of an element is a crucial factor upon which its chemical and physical properties depend. Elements with comparable properties fall in identical vertical columns.
• His periodic table is composed of:

(i) Seven horizontal rows known as periods.

(ii) Eight vertical columns known as groups.

Explanation for incorrect options:

According to Mendeleev's periodic law, “the properties of elements are not a periodic function of their atomic number, atomic volume and atomic sizes.” Thus, options (A), (C) and (D) are incorrect.

Therefore, option (B) is correct. According to Mendeleev's periodic law, “the properties of elements are periodic function of their atomic masses.”