Question

1. which four elements make up 96% of the mass of most living organisms? a) oxygen, carbon, hydrogen, nitrogen b) carbon, hydrogen, nitrogen, phosphorus c) oxygen, carbon, hydrogen, phosphorus d) oxygen, carbon, nitrogen, phosphorus 53) which elements are considered fertilizers? a) n, p, c b) n, k, hg c) c, o, hg d) n, k, p 54) when an atom gains electrons, it is

Explanation:

The four elements oxygen, carbon, hydrogen, and nitrogen make up about 96% of the mass of most living organisms. The elements considered fertilizers are nitrogen (N), phosphorus (P), and potassium (K), often referred to as N - P - K.

Answer:

1. A. oxygen, carbon, hydrogen, nitrogen
2. E. N, P, K