Periodic Classification and Periodic Properties - Result Question 2
####3. The statement that is not correct for the periodic classification of elements, is
(1992, 1M)
(a) the properties of elements are the periodic functions of their atomic numbers
(b) non-metallic elements are lesser in number than metallic elements
(c) the first ionisation energies of elements along a period do not vary in a regular manner with increase in atomic number
(d) for transition elements the d-subshells are filled with electrons monotonically with increase in atomic number
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Answer:
Correct Answer: 3. (d)
Solution:
- (a) Correct statement According to Moseley’s law, the properties of elements are the periodic function of their atomic numbers.
(b) Correct statement The whole
(c) Correct statement Trend is not regular, Be has higher first ionisation energy than
(d) Inccorrect statement
