periodic table
the 3 main catagories
metal, metalloids, non metal
what element has 8 protons
oxygen
what is atomic number
the amount of protons
what element has an atomic number of 6
carbon
what is mass number
protons and neutrons added together
what element has an atomic number of 3
lithium
what is atomic mass
the weight of an element
What element has 10 protons
Neon
what is a valence electrons
the outers electrons
what element has 12 protons
Magnesium