Question

Please help me with these questions I don't get science

Answer 1

There are at least 60 elements in our bodies.

Other elements may be present, but in such small quantities that we cannot detect them with current technologies.

The six most abundant elements (by mass) in our bodies are:

Oxygen           65    %

Carbon            18    %

Hydrogen       10    %

Nitrogen          3.2 %

Calcium           1.4 %

Phosphorus    1.1  %

TOTAL =      99     %

Answer 2

Proteins are made of carbon, hydrogen,oxygen, and nitrogen (CHON). Nucleic acids such as DNA and RNA contain carbon,hydrogen, oxygen, nitrogen, and phosphorus(CHON P). The body also needs trace amounts of other elements such as calcium,potassium, and sulfur for proper functioning of muscles, nerves, etc.