Answer:
0.0075÷0.015=0.5 not so sure lol
An element is a pure substance that cannot be separated or divided into simpler substances by any method (physical or chemical). The four common elements in all the living organisms are carbon, oxygen, hydrogen, nitrogen.
Thus, the four elements that make up about 96 % of body matter are carbon, oxygen, hydrogen, nitrogen (c).
Answer: D
Explanation: I got it wrong on my test :( and got this answer as correct.
Answer: [Ne] 3s¹ sodium electron configuration
