What is the net charge of an ion that has 8 protons, 9 neutrons, and 10 electrons? A. 1+
В. 2+
C. 1-
D. 2-

1 is the answer to this problem

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.