Photons are not considered as objects in the traditional sense, as they cannot exist in a
stationary state.

a. true

b. false

1st fission event

n + fission reactant -> fission product + n + n

so the 2 n created can initiate 2 new reactions

2nd fission event, for each n

n + fission reactant -> fission product + n

so the 1 n created can initiated 1 new reaction

in 1st event 2n are created.

in 2nd event, the 2n from 1st created 1n each for a total of 2n.

combining both events, 2n + 2n = 4n are produced in total.

scientists can reflect on the elements that are already there and predict the next ones