2. why are minerals considered inorganic substances?
3. how do oxides differ from other minerals that contain oxygen atoms?
4. how is a sulfide different from a sulfate?
5. what makes native elements unique?

1.) For minerals to form through natural processes, the correct elements must be present in the right amounts. The physical and chemical conditions, such as temperature, pressure, and pH, must be favorable. In addition, there must be enough time for the atoms to become ordered. Otherwise the mineral grains will remain very small.

2.) In most cases, minerals are considered inorganic substances because they’re not derived from or made by living matter, such as plants and animals. There are a few minerals, however, that are produced by living organisms.

3.) In oxides, the oxygen atoms bond directly to one or more metals. In other minerals, such as carbonates, sulfates, and silicates, the oxygen atoms are part of molecules in which the oxygen is already bonded to another element, such as carbon, sulfur, or silicon. These molecules then bond to other elements.

4.) In sulfides, sulfur atoms bond with one or more metals. In sulfates, the sulfur atoms are part of a molecule that also contains oxygen. The sulfate molecule is what bonds to other elements.

5.) Native elements are unique in that they’re composed of atoms of a single element. For example, gold is composed only of gold atoms. Silver is composed only of silver atoms.

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.

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