Trends of the
Periodic Table
I am so sorry I’m out today! Please be on your best
behavior as you join another class to complete your
work. Make your best attempt to get it done and do
not waste time 
We will discuss when I get back tomorrow!
Using the following slides, color, label and
identify properties of each section of the
periodic table.
st
1
Use the blank periodic table to describe
atomic mass, reactivity and valence electrons.
Each other section has its own page to color
and label.
Atomic mass
increases as you go
left to right and top
to bottom.
Valence e-
1
3 5 7
4 6
2
1 or 2
8
Good conductor of electricity and heat
Solid at room temperature (except Hg –liquid)
Shiny
Ductile – can be put into thin wires
Malleable – can be hammered into thin sheets
Not Shiny
brittle
Not Ductile
Not Malleable
Not good conductors
Gas at room temperature (except
bromine - liquid)
Have properties of both metal
and non-metals
Only conduct partial electricity
(good for computer chips)
Very reactive!
Do not occur freely In nature
1 valence e
Softer than most metals
Can explode if exposed to H2O
Very reactive!
Do not occur freely In nature
2 valence e
two outermost
orbitals to bond
with other
elements
Halogen = “salt former”
Highly reactive
7 valence e
At room temp, some solid, liquid
and gas….
Called noble gases
Full outer shells
Most stable group – will not
react
“rare earth elements”
can be found naturally on
Earth
Usually used in glass
production, or lasers
“rare earth elements”
Most elements man made (with
higher atomic numbers)
All are radioactive