Answer:
<u><em>Plasma</em></u>
Explanation:
<u><em>Plasma</em></u> is the most common because plasma is a gas that has been energized to the point that some of the electrons break
Answer:
the second one i guess????
Explanation:
a substance's density is the same at a certain pressure and temperature, and the density of one substance is usually different than another substance.
Answer:
C. 
Explanation:
0 charge → <em>Neutron</em>
1 charge → <em>Proton</em>
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