For 11-10 refer to this figure. He- 1s² 8.it tells you the main energy level that the electrons occupied.
A. He B.1 C. s D.2

9.it tells you the orbital type that the electrons occupied.
A. He B.1 C. s D.2

10.it tells you the number of electrons occupying an orbital.
A. He B.1 C. s D.2​

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.