How do you find the highest occupied energy level in an element?

When the person with the ball was standing still, how did the observations of the ball's motion by the group and the person tossing the ball compare?

Three ways we can use an electric current

Does the universe ever stop?

Two closed containers look the same, but one is packed with lead and the other with a few feathers. How could you determine which has more mass if you and the containers were orbiting in a weightless condition in outer space?

The graph below represents the relationship between the force exerted on an elevator and the distance the elevator is lifted.

What is Index of refraction?

What is an advantage of using an electromagnet rather than a regular magnet?

What is the difference between Groups and Periods?

When heat is added to a substance, describe how the molecules are affected.

On the Celsius scale, at what temperature does water boil?