The Atomic Theory

The number of protons

neutral subatomic particle located in nucleus 

What group of elements is located along the black line on the periodic table? 

Created the modern periodic table

The number of protons and neutrons 

Who discovered the electron?

Electrons move in orbitals around the nucleus in a definite path

What group of elements is located above the black line on the periodic table? 

Who discovered the proton? 

negative subatomic particle located in electron cloud 

Electrons move in a cloud

What group of elements is located underneath the black line on the periodic table? 

Greek philospher that named the atom, the smallest particle of matter

Who discovered the neutron?

Atom with the same number of protons and different number of neutrons 

positive particle located in the nucleus