Red Seal Cosmetology Practice Exam

What does 'S' stand for in COHNS?

1. Silicon

2. Sulfur

3. Strontium

4. Selenium

The correct answer is: Sulfur

COHNS is an acronym used to remember the five most common elements found in living organisms Carbon, Oxygen, Hydrogen, Nitrogen, and Sulfur. While all of the other options listed, silicon, strontium, and selenium, are also chemical elements, they are not typically found in living organisms and thus do not fit into the COHNS acronym. Keep in mind that although these elements may have important roles in other aspects of chemistry, they are not part of the composition of living organisms.