What does the atomic mass of an atom tell us? (2 points) O How much the atom weighs
O The number of electrons in the atom
O Which row the element is in on the periodic table
O The number of energy levels in the atom

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

Which atomic model was proposed as a result of j. j. thomson’s work?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •