Be able to identify the correct elements using clues such as numbers of protons, locations (family/period), number of neutrons, numbers of electrons

an element's name, chemical symbol, atomic number, atomic mass.

IDK what you are even asking for

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

plasma - state of matter made up of electrically charged particles