QUESTION: Fix punctuation: Another approach to obtaining an estimate of the susceptibility of H is to look at the susceptibilities of hydrides
ANS: Another approach to obtaining an estimate of the susceptibility of H- is to look at the susceptibilities of hydrides.

QUESTION: Fix punctuation: Make a basic row with about 1012 loops
ANS: Make a basic row with about 10-12 loops.

QUESTION: Fix punctuation: The apartment is nice and bright
ANS: The apartment is nice and bright.

QUESTION: Fix punctuation: In recent weeks the application videos have been particularly popular
ANS:
In recent weeks, the application videos have been particularly popular.