This number tells you the number of protons in an atom.
Atomic Number
This is the center of the atom.
Nucleus
Element number 1
Hydrogen
Xenon
This scientists came up with The Periodic Table.
Dmitri Mendeleev
This particle has a positive charge.
Proton
This element has an atomic mass of 238.
U, Uranium
This element is the second Halogen.
Chlorine
What are most elements on The Periodic Table?
This particle has a negative charge.
Electron
Zr
Zirconium
Potassium
Group 18 elements are nonreactive and known as these.
Noble Gases
This particle has no charge.
Neutron
This element has an atomic number of 42.
Mo, Molybdenum
This element has 22 neutrons.
Argon
This number is the number of neutrons plus the number of protons.
Atomic Mass
This is the current model of the atom we use today.
Quantum Mechanical Model
Yb
Ytterbium
This element is named after a state.
Californium OR Tennessine