There are 64 pretzels in a 16-ounce bag how many proportion would be in a 5-ounce bag?

Different isotopes indicate that an element will have different numbers of

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.