***** NOT A TEACHER *****
Hello, Bebe Heart:
You have already received an excellent link. May I add a few extra words?
Sometimes I hear some news readers on TV say, "None of the passengers was hurt," and I hear others say, "None of the passengers were hurt."
Here is some advice from a person who used to work for The New York Times (considered by many people to be the most important American newspaper).
1, "Most authorities have always believed that none is closer in meaning to 'not any (of them)' than to 'not one (of them).' "
2, So it's considered plural in most cases: "None of the chickens are hatched."
3. "None is singular only when it means 'none of it' -- that is to say, 'no amount.' "
a. "None of the milk was spilled."
4. She then gives this advice: "When you really [my emphasis] do mean 'not one,' it's better to say 'not one.' "
a. "Not one of Holyfield's fingers was broken."
i. Compare: "None of Holyfield's fingers were broken." (That is, "Not any of Holyfield's fingers were broken.")
Credit for this information goes to Patricia T. O'Conner, Woe Is I (1996 edition).