Periodicity Project
Charles Ji and Alex Iddins
Home
Classification
Metals
Non-Metals
Metalloids
Trends
Melting Point
Ionization Energy
Atomic Radius
Chemical Reactivity
Ion Charge
Conductivity
Order
Properties of Families
Alkali Metals
Alkaline Earth Metals
Halogens
Noble Gases
Metallic Character
Characteristics
Order of elements according to Atomic number
The atomic number of an element is the number of protons in the atom. A periodic table also sorts the elements according to atomic number. This is also the order of elements according to their weights.