Periodic TableJavier Tellez, Daniel ornelas sandoval
The metals, nonmetals and metalloids are on the right side of the periodic table
An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom), or bound to the nucleus of an atom. A proton is a subatomic particle, symbol p or p+ , with a positive electric charge of +1e elementary charge and mass slightly less than that of a neutron.
Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He formulated the Periodic Law, created a farsighted version of the periodic table of elements, and used it to correct the properties of Dmitri Mendeleev was the father of the periodic table
Noble gases are the less reactive and such as Neon, Xenon etc. But Helium is perhaps more sterile than them, as it does not react with anything at all.
Atomic number is the number of protons. Atomic mass is the number of protons and neutrons.
Valence electrons that is associated with an atom, and that can participate in the formation of a chemical bond to find the number of electrons you look at the atomic mass of an element.