Answer:
what are the items that have been listed?
They are always in motion<span />
Answer:
13
Explanation:
because the number of protons and electrons in the atom are the same
Answer:
1. Ammonia
Step-by-step explanation:
Ammonia, NH₃, is a <em>compound</em> of nitrogen and hydrogen.
Thus, it can be broken down by chemical means into the <em>elements</em> nitrogen and hydrogen.
The other options are <em>wrong</em>, because Al, Sb, and Pb are elements. They cannot be broken down chemically into simpler substances.