The atomic nucleus contains two subatomic particles, the proton and the neutron. atoms of different elements have different numbers of protons and neutrons. the nuclei of atoms that are the most stable have proton to neutron ratios of: a) 1 to 1 b) 2 to 1 c) 1 to 2 d) there is no pattern that indicates stability in the nucleus

Could someone me find the answer to this problem.

What is similar between metals and suspensions

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?