4. When a rifle is fired, how does the size of the force of the rifle on the bullet compare to the force of the bullet on the rifle?

ammonium chloride & tallow

see earlier

a.   mass number from atomic number

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.