When the stopper is released from the same height as the crossarm, is the ending height of the stopper exactly the same as its starting height?

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

Hi + naoh -> h2o + nal

Answer///an early form of the atomic theory; dalton atomic theory;