A Halogen is a group (or a column) on the periodic table. It contains fluorine, chlorine, bromine, and astatine!
The answer is $2.89.
Since it’s asking for the unit price of one gallon and you have the total ($34.68 and 12 gallons), you would divide $34.68 from 12, which gives you $2.89.
34.68/12 = 2.89
Actually when you look that up.... UH that is hair loss or he could be considered MR. CLEAN
He proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus but can jump from one energy level (or orbit) to another.