C. Ca and Br because they're metals and nonmetals
The answer would be:
D = M/V
D=Density
M= mass
V= volume
Answer:
the number of protons and neutrons at both terminals are equal
Explanation:
When the number of positive charge and negative charge are both equally the terminal, it becomes neutral and out of charge, because first it undergo enough chemical reaction and there is no remaining tendency for positive and negative charges to get separated. When this tendency dies, the battery also will run out of charge.
It would be 7 because the acid and base cancel out each other
The purpose is that it shows you all the elements we know and it arranges them in groups that are also the same kind like Chemistry.
