Periodic table
The 3 main categories
Metals
Nonmetals
Metalloids
What element has 8 protons
Oxygen
What is atomic number
The amount of protons
What element has an atomic number of 6
what is mass number
Protons and neutrons added together
what element has an atomic mass of 3
Lithium
What is atomic mass
The weight of an element
What element has 10 protons
Neon
What is a valence electron
The outermost electron shell
Magnesium