Answer:
4 sun , planet, moon are the components in the correct order
They become an ionic bond, and are weakly bonded compared to covalently bonded atoms
You want me to explain it as well?
This would problem will be answered using the concept of momentum. Momentum is the mass times the velocity, where mass is inversely proportional to the velocity. This would mean that an object with greater mass will travel at a much lesser velocity, or vice versa.
Hence, the cart with the smaller mass will accelerate faster.