How would the particles of a solid, liquid, and gas ALL at room temperature compare? * A. solid particles have lower average kinetic energy
B. the gas particles are larger than both solid and liquid
C. the pas particles are moving the slowest
D. the spacing of the particles is different, but all have the same average kinetic energy

Plz help

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?