Periodic Classification Of Elements - Study Mode
[#236] Which of the following types of elements show variable valency?
Correct Answer
(D) Both A and C
[#237] Californium is a member of the . . . . . . . . group.
Correct Answer
(B) actinide
[#238] How does the metallic property of an element change in the modern periodic table?
Correct Answer
(D) The metallic property decreases in the period from left to right but increases from top to bottom in the group
[#239] The rule of octaves was applicable only till . . . . . . . .
Correct Answer
(C) calcium
[#240] When the elements are arranged in increasing order of atomic weights, the atomic weight of the middle element is approximately the average of the atomic weights of the other two elements' - this rule is known as-
Correct Answer
(D) Dobereiner's law of triads