If you found a piece of iron on the ground and it was determined that it came from outer space, what would you have found?
a. a meteor
b. a meteorite
c. a meteoroid
d. a part of a comet
plz

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?

When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two

Can someone me out on this question for my national 5 chemistry homework