Question

Use the drop-down menu to complete the statement. An electron in the first energy level of the electron cloud has _____ an electron in the third energy level.

A. a lower energy than
B. a higher energy than
C. the same energy as

Answer 1

A the first one

Step-by-step explanation:

Answer 2

Answer: Option (A) is the correct answer.

Step-by-step explanation:

According to Aufbau's principle, in the ground state of an element, electrons first enter into the lowest energy level before entering into higher energy level.

This means that an "s" sub-shell has lower energy than a "p" sub-shell so, s shell will fill first and then p shell will be filled.

For example, atomic number of carbon atom is 6 and its electronic distribution is
`1s^(2)2s^(2)2p^(2)`.

Thus, we can conclude that an electron in the first energy level of the electron cloud has a lower energy than an electron in the third energy level.