Test Index

WAEC Chemistry 2013 Paper

Question : 6

Total: 47

Solution:

Concept:

The Aufbau principle states that electrons fill the lowest energy sublevels first.

Explanation:

According to the Aufbau principle, the correct increasing order of electronic energy levels is:

1s \lt 2s \lt 2p \lt 3s \lt 3p \lt 4s \lt 3d

Thus, the correct sequence is

1s, 2s, 2p, 3s, 3p, 4s, 3d

This sequence matches option C.

Answer:

Option C:

1s, 2s, 2p, 3s, 3p, 4s, 3d

Go to Question:

Prev Question

Next Question