DO NOW
You must be silent and
working for credit
 Be on time
 Enter silently
 Grab papers
 Immediately start work
 No talking
How many days left until
we reach our big goal?
2. Where are protons and
neutrons located?
3. In order for an atom to be
neutral, what two
subatomic particles do
you think need to be the
same?
4. What is the group and
period number for:
1.
1.
2.
Na
Re
DO NOW REVIEW
1. How many days left until we reach our big goal?
2. Where are protons and neutrons located?
3. In order for an atom to be neutral, what two
subatomic particles do you think need to be the
same?
4. What is the group and period number for:
1.
2.
Na
Re
ATOMIC MATH!
NOTES EXPECTATIONS:
SILENT
WRITE WHAT IS IN RED
QUESTIONS MUST RELATE TO THE CONTENT
NO BATHROOM
So how would I label this diagram?
So how would I label this diagram?
So how would I label this diagram?
So how would I label this diagram?
 Key Point #1: The periodic table is arranged
by increasing (from left to right) atomic
number
 Key Point #2: The atomic number is the
number of protons and is the ONLY thing
that determines the type of element you have
Atomic Number is an Element’s ID
Number
 Like your social security number or a
professional athlete’s jersey number,
the atomic number of an element
identifies that element
Navigating the Periodic Table
What is the atomic number of…
1.
2.
3.
4.
Lithium? 3
Magnesium? 12
Silver? 47
Boron? 5
ATOMIC NUMBER = ID NUMBER
 So, no matter what a problem may give you:
What element has 45 protons, 35 neutrons and 27
electrons?
We always want to look at…..
How is the periodic table useful?
 Watch this…
How is the periodic table useful?
 Watch this…
How is the periodic table useful?
 Watch this…
 Key Point #3: The mass number is how much




one atom of a given element weighs.
Practice!
What is the mass number of Zinc (Zn)?
Gold (Au)?
Oxygen (O)?
 MASS NUMBER = # PROTONS+ # NEUTRONS
Key Point #4:
FIRST, FIND ATOMIC # AND MASS
PROTONS and ELECTRONS = ATOMIC
NUMBER
NEUTRONS = MASS NUMBER – PROTONS
ELEMENT
# PROTON
# NEUTR
# ELEC
ATOMIC
MASS #
These equations
will
help us do
something
like#this:
Al
13
16
EXIT TICKET
Number of
Protons
Number of
Neutrons
Calcium (Ca)
20
20
Nickel (Ni)
28
Element
Gold (Au)
Atomic
Number
79
6
Mass Number
59
118
14