3Q_Science_1D (Element Sub-atomic Particles)

Dmitri Mendeleev

made the periodic table

Chemical Symbol

is a one- or two-letter abbreviation that represents a chemical element

Chemical Symbol

These symbols are based on the element’s English or Latin name and are standardized by the International Union of Pure and Applied Chemistry (IUPAC). 

e-

electron

p+

proton

n_⁰

neutron

Proton

atomic number

Electrons

protons

Mass Number

neutron + atomic number

Neutrons

mass number - atomic number