2.0 I can identify atoms, isotopes and ion for a given element
2.1 I can explain how the cathode ray tube, oil drop experiment, and gold foil experiment furthered our understanding of the structure of the atom.
2.2 I can calculate the relative atomic mass for a given element using the naturally occurring isotopes.
2.3 I can write the electron configuration for a given element or ion.
2.4 I can determine the number of valence electrons an atom has based on electron configuration.