1. which crystal system has the simplest structure? 2. do all minerals have crystal structures? 3. which crystal structure do the majority of minerals have? why do you think that is? does it make them more useful?

Explanation:

1) The simplest structure is cubic system like simple cubic, body-centered cubic and face-centered cubic in the crystal system.

2) Yes, all minerals have crystal structures because minerals have definite crystal structure. Minerals are solids that are formed naturally through the inorganic processes. Some mineral properties are density, shape, color and hardness.

3) Minerals are the naturally occuring inorganic substances which have ordered atomic arrangement, they are not made by humans that's why we can't predict the specific structure of majority of minerals.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%