SEPTEMBER 14, 2015
An atom of a certain element has 36
protons, 36 electrons, and a mass
number of 84. At room temperature
this element is a very stable gas. How
many neutrons are in this atom?
COLORING THE PERIODIC TABLE
1.
Label groups 1-18.
In your notebook:
Groups are also called families. Groups 1
and 2 and 13-18 all share the same number
of valence electrons. Elements in the same
group have similar chemical properties and
react with other elements in similar ways.
COLORING THE PERIODIC TABLE
2. Number the periods 1-7.
In your notebook:
The rows on the periodic table are called
periods. The atomic number increases by one
as you move left to right across a period. All
the elements in a period have the same
number of electron shells.
COLORING THE PERIODIC TABLE
. Color the nonmetals.
3
NON-METALS HAVE THESE PHYSICAL
PROPERTIES…
No luster (dull appearance)
Poor conductor of heat and electricity
Brittle (breaks easily)
Most are gases
EXIT TICKET
How does the organization of
the periodic table help us
make predictions?