In which of the following is the number of neutrons correctly represented? Group of answer choices

In Mg-20, Mg has 12 neutrons.

In F-19, F has 0 neutrons.

In U-238, U has 146 neutrons.

In As-38, As has 38 neutrons.

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.

What is the solubility of substance?

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.