Question

what does newton's 3rd law of motion state?

if the collision involves sticking together, it is elastic

a net force ill cause an object to accerlate at a rate that depends on the mass of the object

every action has an equal and oppsite reaction

an object in motion tends to stay in motion, and an object at rest tends to stay at rest unless acted upon by a net force

Answer 1

Newtons 3rd law is for every action there is an equal and opposite reaction.

Elastic is when no energy is lost, if a collision sticks together all energy is lost, so no.

true

true 3rd law

1st law true

Answer 2

Particle-A is an electron, racing around in a cloud that's far from the nucleus.

Particle-B is either a proton or a neutron, in the nucleus.

The big clue is where you said that particle-A has very little mass

compared to particle-B.  Protons and neutrons have almost identical

masses, but it's the same mass as more than 1,800 electrons !