Mendeleev's period table examined the relationship between the atomic mass of elements and their

Correct option is B

The correct answer is (B) physical and chemical properties both.

Explanation:
Mendeleev’s periodic table was based on the relationship between atomic mass and the periodicity of both physical and chemical properties of elements.

Information Booster:

• Mendeleev's Periodic Table: Arranged elements by atomic mass, showing periodic trends in properties.
• Periodic Law: Properties of elements vary periodically with atomic mass.