In cathode-ray tubes, the cathode ray is emitted from the negative electrode, which is called the 2. the smallest unit of an element that can exist either alone or in molecules containing the same or different elements is the

1.)Cathode 2.)Atom For the first part, the cathode is the basically like the negative side or terminal. On batteries (cylindrical cells like the ones you get out of the store for your TV remotes or wireless computer mouse) usually have the cathode on the bottom. The atom is known as the smallest physical form of any object (other than protons, neutrons, and electrons).

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water