Name__________________________________Class_______Date____________
Fill out the following chart using your Periodic Table:
Element
Element
Atomic # Mass #
Protons
Electrons Neutrons
Name
Symbol
Calcium
Ar
11
4.3 Modern Atomic Theory p.113-118
1. What did Bohr’s model of the atom do that Rutherford’s did not?
2. What are energy levels?
3. Can an electron move from one energy level to the next? When can
they do this?
4. What is the electron cloud model AND what do scientists use it for?
5. What is an orbital?
6. Define ground state.