The group 7A elements are called Halogens.
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The term amphoteric describes a substance that can act as both an acid and a base.
The element is silicon (Si). It forms minerals like quartz and rocks such as granite.
Answer:
<h2>hydrogen gas is produced .</h2>
A. Ammonium = polyatomic ion
B. Oxygen = compound
C. Silver = element
D. Nitrate = polyatomic ion
E. Helium = element
F. Water = polyatomic ion
G. Nitrogen = element
H. Carbon dioxide = compound
