Question

Which of the following is not correct statement for periodic classification of elements?

• A. The properties of elements are the periodic functions of their atomic number.
• B. Non – metallic elements are less in number than metallic elements.
• C. The first ionization energies of elements along a period do not vary in regular manner with increase in atomic number.
• D. For transition elements, the last electron enters into (n – 2) d – subshell.

Answer 1

Answer: (D)

For transition elements, the last electron enters into (n – 2) d – subshell.

Answer 2

: The last electron in transition elements enters into ( n – 1) d – subshell.