3. Determine if the following compounds are formula units or molecules
Α.NO₂
B. CO2
C. MgCl2

What layer of the atmosphere is directly above the troposphere?

What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.