Nerve gases (also known as nerve agents) are a class of chemical weapons. During Day 5, the terrorist group known as the Dawn Brigade (led by Vladimir Bierko) used a stolen nerve gas called Sentox to threaten America.
the number of words in a novel will vary depending on the genre a young adult novel will run between 20000 and 40000 words that would be the length of a novella in mainstream fiction many genres seem to have succumbed to supersizing a mass market western mystery or sf novel used to run to 60000 70000 words
Like they will say that a novel is a story of 40,000 words or more, a novella is 20,000 to 40,000 words, and anything shorter is a short story. As far as I know there's no standard in the publishing business, though. These are just ballpark numbers.