Q 2.1: There are 92 naturally occurring elements on Earth. How many of these elements are normally found in the human body?

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Individuals within populations exhibit some diversity. as a result of possessing slightly different traits, some individuals are better able to survive and reproduce than others. if these individuals changes in the characteristics of the population may occur over time. the cumulative change in these characteristics is known as

Why protons do not repal in the nucleus