1. DO NOW
DECEMBER 10, 2012

2. Calculate the number of electrons, protons, and neutrons for the following elements:
Mendelevium
Curium
Bismuth
Tin
Cadmium
Iodine
Argon
Oxygen

3. Terminology The force that holds atoms or ions together as a unit.
A mixture of two or more elements, at least one of which is a metal, that has the characteristic properties of a metal.
The chemical energy stored in living things.
A series of fission reactions triggered by neutrons released during the fission of a nucleus.
The study of the universe beyond Earth.
An electron emitted by an unstable nucleus.
astronomy
Beta particle
alloy
Chemical bond
Chain reaction
Biomass energy

4. Objectives:
SWBAT: describe Bohr’s model of the atom and the evidence for energy levels.
SWBAT: explain how the electron cloud model represents the behavior and locations of electrons in atoms.
SWBAT: distinguish the ground state from the excited states of an atom based on electron configurations.

5. Independent Practice
Re-illustrate the science & history models of the atom timeline on pages
Recreate the timeline exactly as it is shown.

6. Exit Ticket Complete the following statements:
An electron in an atom can move…..
Scientists use the electron cloud model to……
An electron cloud is good….
The most stable electron configuration is….