Question

1. Which elements are most abundant in living organisms?

hydrogen, carbon, calcium, potassium, oxygen, and phosphorus
oxygen, calcium, phosphorus, sodium, hydrogen, and carbon
carbon, potassium, iron, magnesium, hydrogen, and nitrogen
oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus

Answer 1

The set of element that are the most abundant in living organisms include oxygen, nitrogen, carbon, hydrogen, Sulfur and phosphorus.

Answer 2

CHON is the mnemonic acronym for the four(4) most common elements in living organisms.
C - carbon
H - hyrogen
O - oxygen
N - nitrogen

Among the choices, only the last option contains CHON.
oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus