Which element has seven energy levels? O francium
rubidium
(Fr)
(Rb)
(K)
(Cs)
potassium
cesium

Based on the position vs. time graph which velocity vs. time graph would correspond to the data

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166