The air we breathe is mostly a mixture of oxygen and hydrogen. How do air molecules change above 100 km? Group of answer choices

Water vapor condenses from the cold air.

The electrically charged ions in the ionosphere creates turbulence.

Meteors burn in Earth's atmosphere.

Gases are no longer evenly mixed but layered.

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.

Modern weaponry has increased the number of deaths in wars and violent conflicts.

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons