Chemistry Tutorial

Problem 3: Elemental compositions

The elemental composition of the universe, Earth's crust, and the human body differ sharply. What factors might contribute to these differences?

C.	In addition to being available, elements must also be suitable or have properties that are compatible with living processes.ago when life began.
	Correct. Comparing the availability of elements on earth with the relative composition of living organisms shows that availability is not enough. Elements must also be suitable.