Name the haloalkane that has 7 carbons in a chain, a chlorine on the second carbon, and a bromine on the third carbon.

Answer is: name of haloalkane that has 7 carbons in a chain, a chlorine on the second carbon, and a bromine on the third carbon is 2-chloro-3-bromoheptane.
The halogen is a prefix to the alkane. The haloalkanes (halogenoalkanes) are a group of chemical compounds derived from alkanes containing one or more halogens (fluorine, chlorine, bromine...).

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom