Element
Made up of one atom
Atom
Smallest part of an element that can exist by itself
Proton mass and charge
Mass = 1 Charge = +1
Neuton mass and charge
Mass = 1 Charge = 0
Electron mass and charge
Mass = almost 0 Charge = -1
Atomic number
Bottom
Mass number
Top
Number of protons
Bottom
Number of neutrons
Top - bottom
Number of electrons
Bottom
Atoms consist of central _________ containing protons and ________. The nucleus is _________ compared to the size of the whole atom. The nucleus is surrounded by the ________ in energy levels ( also called ________).
Nucleus Neutrons Small Shells Orbital
Describe the parts of an atom