How can you tell something is a nuclear reaction rather than just a chemical reaction? pls ! a- energy has been lost as a result of the interaction b- energy has been gained as a result of the interaction c- the products are different than the reactants d- there are different elements as products e- none of the above !

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.

At a temperature of 393 k, the temperature of a sample of nitrogen is 1.07 atm what will the pressure be at a temperature of 478 k

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?