In Bohr’s model, the lowest energy level is called the ground state. The principal quantum number "n" equals 1 for this state. A. The ground state is unstable. The electron eventually spirals into the nucleus, just like in the solar system model. B. The ground state is stable. If no photons are directed at the atom, the electron will just stay in the n=1 orbit. C. The ground state is stable. However, the electron occasionally moves closer to the nucleus, but it quickly returns to n=1

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.

Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Wow good luck with that answer