Answer:
On both sides of the equation, there are 5 atoms of H
Explanation:
H₂ is a dyatomic molecule, so it has 2 atoms.
In ammonia, there are 3 atoms of H plus 1 atom of N.
In chemistry and physics, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
The choices for this are as follows:
A) gases; solids
B) metals; nonmetals
C) nonmetals; metals
<span>D) reactive; nonreactive
</span>
I think the correct answer is option B. The stair-step line between the pink squares and the yellow squares separates the metals from the nonmetals. Hope this helps.
Besides carbon dioxide and water as the main products of burning coal, there are a number of by-products of burning coal, such as different oxide of sulfur (usually SO₂, but much more), different oxide of nitrogen, and many heavy and toxic metals (such as mercury, arsenic, cadmium, lead).
Coal has more aromatic hydrocarbons that more aliphatic fuels and burning of aromatic hydrocarbons produces more soot that burning of aliphatic hydrocarbons.