How are isotopes of the same element alike? Select all that apply. They have the same number of protons.
They have the same mass number.
They have the same number of neutrons.
They have the same atomic number.

the volume increases

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.