What is the mass of Na?
2NaN3
2NaN3 2Na + 3N2
(500g) (?) (3235)

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

How many grams of sodium chloride are in 250ml of a 2.5m naci solution

Within nonmetals,ions that have more electrons tend to be bigger than ions that have fewer additional electrons why?