What type of spectrum is produced when electromagnetic radiation is emitted or absorbed as electrons change energy levels in an atom?

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.

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume

Determine type of reaction & predict the product c3h12+o2 =