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CHM 101 CHM 101 Past Questions Objective Question
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Question

Which of the following statements is not correct about the periodic classification of elements?
Options
A Metallic elements are more in number than non-metallic elements.
B The properties of elements are periodic function of their atomic numbers.
C Across the period, ionization enthalpies of elements increase with increasing atomic number.
D For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

The 4s orbital fills before 3d (except for certain exceptions after filling). Statement D is incorrect.

Hint

Recall the order of orbital filling (Aufbau).

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1762 of 1872
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