Answer:
because the want to reach their destination
Potassium, 4 shells, 1 valence electron
The most likely thing that happened with this poor young woman who broke her leg was that she broke hte bone at a very young age and that it fully healed. C
This is so because collagen is a substance that gets secreted at the point of fracture which helps strengthen the bone. Having a higher amount of collagen at the site of a broken bone means that the bone probably healed properly and there was a remainder of collagen to be found.
The Kinetic energy is 345,600 J
=1/2^2