Which 3 elements had complete out shells? (you will probably need to use the periodic table)

In which of these cases are the two wave points considered to be in phase with each other?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted