Question

Determine the highest occupied energy level in the

following elements:
a. He
b. Be
c. Al
d. Ca
e. Sn

Answer 1

The highest occupied energy level corresponds to the period number of each element on the periodic table: Helium (n = 1), Beryllium (n = 2), Aluminum (n = 3), Calcium (n = 4), and Tin (n = 5).

Step-by-step explanation:

Determine the Highest Occupied Energy Level

To determine the highest occupied energy level of an element, one can look up its position in the periodic table. The period number of an element corresponds to its highest occupied principal energy level. Here is the highest occupied energy level for each element in question:

He (Helium): The highest occupied energy level is n = 1.

Be (Beryllium): The highest occupied energy level is n = 2.

Al (Aluminum): The highest occupied energy level is n = 3.

Ca (Calcium): The highest occupied energy level is n = 4.

Sn (Tin): The highest occupied energy level is n = 5.

Answer 2

He, because it’s a noble gas which they have full valence electrons (occupied energy levels)