In which of the following compounds does sulfur have an oxidation number of +2? * h2so4 h2so3 scl2 h2s

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.

All forces cause motion? true or false

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?