By looking at it and if it is making a single movement it is moving.
Clouds are formed by water then it evaporates into air
In Thomson's experiment, he showed that an electrical current can be made to flow from a positive site to a negative site.
Hello!
Whenever you see an atomic number with an element, you know the number of protons in the nucleus of the atom, which determines the chemical of an element and its place on the periodic table.
For example, Hydrogen has only one proton, however, if you were to add say 78 more protons, you'd get gold!
The SI unit for the amount or quantity of small particles in a sample is referred to as the mole.
This tells how much in terms of atoms or molecules are present for a particular mass.
