How did Robert Millikan's oil drop experiment change scientists' view of the atom?
A. It identified the charge on a single electron.
B. It showed that atoms could not be divided into smaller particles.
C. It showed that atoms were found in different energy levels.
D. It identified the location of the nucleus.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

let that person have a turn to speak : )

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter