The atoms in a sample of an element are in excited states. a bright-line spectrum is produced when these atoms a. absorb energy b. absorb positrons c. emit energy d. emit positrons

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.

Which suspect most likely committed the robbery and how do you know

In a ball-and-stick molecular model, what do the sticks represent?