This group is called “noble gases” because they do not react with other elements. This is because they have a full valence shell.
I suppose that you wanted write "uncharged". The particles without electrical charge present in the nucleus are called neutrons.
the puck recoils in each case.
larger mass stone gives puck greater recoil, smaller stone, smaller recoil
False. That description fits the wave's 'frequency'.
It has nothing to do with refraction.