Q: Which one of the following properties of an element was considered by Mendeleev in order to form his Periodic Table?
(a)Atomic volume
(b)Atomic mass
(c)Atomic number
(d)Vapour density
Correct Answer: (b)
The correct answer is (b): Atomic mass. Subject: Geography | Sub-topic: Population & Demography Note: This answer was determined through AI-based research. Verify against the official answer key when available.