Which is the best predictor of the radioactive nature of an isotope? the proton-to-electron ratio the neutron-to-proton ratio the neutron-to-electron ratio the electron-to-proton ratio

Ais the answer hope this

Answer choices? if there is any

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.