Periodic Table Week 2 Day 2 Wednesday – Valence Electrons!
Directions for Today:
1. Glue the worksheet in to IP/OP 52
2. Sodium Reaction
3. Answer the questions using your Periodic Table. You
should be filling in a Bohr Model for each problem.
(Nucleus in the middle has protons and neutrons. The first
electron shell/orbit can only hold two electrons. Each shell
after that can hold 8 electrons. Even if there are more
elements in the period, the electrons will fill in the S orbitals
and D orbitals so that the last valance electron shell is never
more than 8)
4. Highlight the last shell/orbital in which you place electrons.
This is your Valence Electron Shell.
a. Please note that you may find that you will not use
every shell!!! Notice that your Valence Shell changes
depending on the Period!
b. How would you draw a Lewis Dot Structure of the
element? Remember the Lewis Dot structure only
looks at the valance electron shell
Homework ECQ’s
Brain Pop: Atoms
Valence Electrons
Draw a Bohr model of Li
Draw a Bohr model of B
What period is Lithium in?
How many electron shells?
How many valence electrons?
What group is Li in?
What period is Boron in?
How many electron shells?
How many valence electrons?
What group is B in?
Draw a Bohr model of Na
Draw a Bohr model of Al
What period is Sodium in?
How many electron shells?
How many valence electrons?
What group is Na in?
What period is Aluminum in?
How many electron shells?
How many valence electrons?
What group is Al in?
OP 52
Draw a model of He
IP 52
How do the electrons shells relate to the periods?
How do the valence electrons relate to the columns?
What period is Helium in?
How many electron shells?
How many valence electrons?
What group is He in?
Draw a model of Ne
What period is Neon in?
How many electron shells?
How many valence electrons?
What group is Ne in?
How many empty spots are in the valence shell for He, Ne,
and Ar? Explain how this makes these atoms “Noble”