Which transition is associated with an emission of energy? n = 5 to n = 4

n = 4 to n = 7

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Drive down any three characteristic of modern periodic table