In an ozone molecule, the three atoms must be connected, so there must at least be a single bond between them. Place dots in pairs around the oxygen atoms until each oxygen atom has eight valence electrons, starting with the atoms on the outside and doing the central atom last if there are enough. Do not exceed the total number of valence electrons identified in part A. Remember that the dashes between the oxygen atoms, which represent single bonds, each indicate the presence of two valence electrons.

n+h→nh3

we must remember that nitrogen and hydrogen are both diatomic molecules in their standard gas form. this adjusts the equation to

n2+h2→nh3

now we need to adjust coefficients in order to balance the atoms on each side of the equation. currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

we can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

n2+3h2→2nh3

this gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.