Presentation on theme: "Atomic Models Bohr Model Cloud Model. Bohr Model l Electrons orbit the nucleus in definite orbits. l The orbits can hold only a specific number of electrons."— Presentation transcript:
Atomic Models Bohr Model Cloud Model
Bohr Model l Electrons orbit the nucleus in definite orbits. l The orbits can hold only a specific number of electrons. l Once a level is full, the electrons start filling the next level.
Electron Level Limits: l 1st Level = 2 electrons l 2nd Level = 8 electrons l 3rd Level = 8 electrons
Hydrogen: + -
Cloud Model: l The electrons are in an area around the nucleus called an electron cloud. l There are enough electrons to make the atoms charge neutral
Hydrogen: 1P 0N 1E
Helium: 2P 2N 2E
Lithium 3P 3N 3E
Assignment: l Draw a Bohr Model and a Cloud Model for the first 18 Atoms on the Periodic Chart. l Include the Atomic Number and Mass. l You may write rather than draw the number of protons and neutrons there are in the nucleus, but draw all electrons for the bohr model.