The document is an agenda for a chemistry class that includes reviewing the periodic table, discussing the ionic charges of magnesium and fluorine, drawing isotopic symbols for carbon-14 and hydrogen-3, and completing a worksheet on atomic structure and the Bohr model. The class objectives are to explain the usefulness of the shell model, describe how to set up the shell model, and know how many electrons are in each energy level.

1. Agenda Bell Work
• Periodic Table Review • What is the ionic charge
for:
• Notes: Bohr Model – Magnesium that loses 2 e-
– Fluorine that gains 1 e-
• Draw the isotopic symbol
for the following:
Carbon – 14
Hydrogen - 3
• Pick up Atomic Structure
and Theory WS to
complete

2. Bohr Model
January 3, 2013

3. Objectives
1. Explain the usefulness of the shell
model
2. Describe how to set up the shell
model
3. Know how many electrons are in
each energy level

4. Shell model
 A region of space around the atomic
nucleus where electrons may be
 Each shell can hold a limited amount of
electrons

5.  Series of seven shells accounts for the
seven periods
 Number of electrons held in each period is
equal to the shell’s capacity for electrons

7. Valence Electrons
 Electrons in the outermost shell
“combining power”
 Directly exposed to the external
environment
 The first to interact with other atoms

8.  Making Molecules