WELCOME!!
1. Please be in your seats by the
time the bell rings.
2. On your catalyst sheet you
should be on October 27th.
CATALYST
5 MINUTES
•
•
Your atomic # is 10. What
is your number of protons
and electrons.
Now you have a mass # of
13, what is your number of
neutrons?
CATALYST
4 MINUTES
•
•
You atomic # is 10.
What is your number of
protons and electrons.
Now you have a mass #
of 13, what is your
number of neutrons?
CATALYST
3 MINUTES
•
•
You atomic # is 10. What
is your number of protons
and electrons.
Now you have a mass # of
13, what is your number of
neutrons?
CATALYST
2 MINUTES
•
•
Your atomic # is 10. What
is your number of protons
and electrons.
Now if your mass number
is 13. What is your
number of neutrons?
CATALYST
1 MINUTE
•
•
Your atomic # is 10. What
is your number of protons
and electrons.
Now if your mass number
is 13. What is your
number of neutrons?
TIME’S UP!!!!!
Catalyst Answer
•
•
•
•
You atomic # is 10. What is your number of
protons and electrons.
10
Now you have a mass # of 13, what is your
number of neutrons?
3
AGENDA
• Catalyst
• Notes over Electron Levels
• Bohr Model practice
ANNOUNCEMENTS
1. See me for help.
2. Quizzes to be taken Friday if
not taken.
3. Chemical science Halloween
demos on Friday
TODAY’S OBJECTIVE
•Today you will be
introduced to electron
orbit levels and practice
with the Bohr model
diagram.
•
HS-PS1-2: Create knowledge of reaction based on patterns of properties
How are atoms drawn?
• Electron Diagrams!!!!
Nucleus is still located
in the center
Note the pattern at
which electrons are
filled in each orbital:
•First orbital holds
TWO electrons
•Second orbital holds
EIGHT electrons
•Third orbital holds
EIGHT electrons
Electrons are
placed in their
orbitals
Drawing the diagram:
Example: Draw electron diagram for carbon: 6
protons, 6 neutrons, 6 electrons
Step 1: Find the number of electrons
– According to our example, how many
electrons does carbon have?
– 6!!
P- 6
N-6
Nucleus
Drawing the diagram
• Example: Draw electron
diagram for carbon: 6
protons, 6 neutrons, 6
electrons
P- 6
• Step 2: Draw first electron
orbital around nucleus.
– How many electrons does it
hold?
– 2!!
N-6
Draw the diagram
• Example: Draw electron
diagram for carbon: 6 protons,
6 neutrons, 6 electrons
• Step 3: If more electrons need
to be filled, draw another
electron shell.
– How many electrons does
the second shell hold?
– 4!!
– How many electrons do we
have left over?
– 0!!
P- 6
N-6
Example
• Argon: 18 protons, 22 neutrons, 18
electrons
Example
• Helium: 2 protons, 2 neutrons, 2 electrons