What does the atomic number of an atom tell us?

First the atomic number identify's the chemical element. For example, if the atom is nuclear, the atomic number equals to the electrons. So, the atomic number identifies the properties of the atom and/or which the atom belongs to.

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation: