Download Engage Periodic Trend Activity

Step #1
Boys move to the left side of
the front of the room.
Bring your entrance cards
with you.
Girls move to the right side of
the front of the room.
Bring your entrance cards with
you.
Step # 2
• Within your group
form three
subgroups based on
your hair length
(short, medium,
long) and create
three lines based on
your hair length.
Step # 3
• Now look at your
“entrance cards” and
within the three
subgroups that you
just made form rows
based on increasing
ability to attract
money and the
energy required to
remove your cell
phone.
Lowest
Highest
Where do they belong???
Ability to attract money: 4.00
Energy required to remove cell
phone: ????
Ability to attract money: 3.75
Energy required to remove cell
phone: 15.62
Go back to your seats…
Atomic Radius
• Atomic radius is simply the radius of the atom,
an indication of the atom's volume.
• Atomic radius is one-half the distance
between the two nuclei in a molecule
consisting of two identical atoms.
Electronegativity
Electronegativity is
the ability of an atom
to attract a
neighboring atom's
electrons.
Ionization Energy
• Ionization energy is the
amount of energy
required to remove an
electron.
Ionic Radius vs. Atomic Radius
• Metals - the
atomic radius of
a metal is
generally larger
than the ionic
radius of the
same element.
• Why? Generally, metals lose
electrons to achieve the
octet. This creates a larger
positive charge in the
nucleus than the negative
charge in the electron
cloud, causing the electron
cloud to be drawn a little
closer to the nucleus as an
ion.
Ionic Radius vs. Atomic Radius
• Non-metals - the
atomic radius of
a non-metal is
generally smaller
than the ionic
radius of the
same element.
• Why? Generally, nonmetals gain electrons to
achieve the octet. This
creates a larger
negative charge in the
electron cloud than
positive charge in the
nucleus, causing the
electron cloud to 'puff
out' a little bit as an
ion.