Transcript 14-Periodic Trends

Drill: Determine
wavelength of a
221 g ball
traveling at
60.0 m/s.
Review &
Collect Drill
& HW
CHM II HW
• Review PPs 13 & 14
• Complete the attached
assignment & turn it in
tomorrow
Are there any
questions on
previous
material?
Chemical
Periodicity
Atomic Size
• Size increases as you
go down in any column
• Size decreases from
left to right in any row
Ionic Size
•Size increases as total
charge decreases
+2
•C
+4
C
>
-1
•F > F
Rank the elements from
their atomic number
from smallest to largest
9, 55, 13, 11, & 1
Ionization Energy
•The energy required
to remove electrons
from atoms or ions
1st Ionization Energy
• Decreases as you go
down any column
• Increases from left to
right on any row
• Fr <<<<<<<<<<<<<He
Shielding Effect
• The further away an
electron is from the
nucleus, the more electron
clouds lie between the
electron & the nucleus
Ionization Energies
•2nd > 1st
•3rd > 2nd
•Massive increase when
a shell is emptied
Electron Affinity
•The attraction of
electrons by an
atom
Electron Affinity
• Decreases as you go
down any column
• Increases from left to
right across any row
• Fr <<<<<<<<<<<< F
Drill: Arrange the
following atoms from
st
lowest to highest 1
ionization energies:
2, 20, 14, 55, 7
Review &
Collect Drill
& HW
CHM II HW
• Review PPs 13 & 14
• Complete the attached
assignment & turn it in
tomorrow
Are there any
questions on
previous
material?
Electronegativity
•The attraction of
shared pairs of
electrons by an atom
Electronegativity
• Decreases as you go
down any column
• Increases from left to
right across any row
• Fr <<<<<<<<<<<< F
Drill:
Describe the trends
of the first four
ionization energies
of aluminum
Metallic Character
•Increases as you go
down any column
•Decreases from left to
right across any row
Reactivity
•Metals 1A > 2A > 3A
•Metals increase down
•Nonmetals increase as
you get closer to F
Drill: Place the following in
largest to smallest order with
respect to: 1) diameter
st
2) 1 ionization energy
3) electronegativity
4) metallic character
•Elements #: 1, 4, 8, 15, 55
Review &
Collect Drill
& HW
Test
Tomorrow
Test
Review
Choose the higher of each
pair in: ________
Na-Cl
S-Cl
Mg-S
N-O
Fe-Cr
H-Cl
Si-Cl
Fe-Ru
Draw the electron
configuration for:
Cl-17
Fe-26
+3
(Cr-24)
Ra-88
-2
(Te-52)
Draw the electron
dot diagram for:
Cl-17
Fe-26
Ra-88
Cr-24
Te-52
As-33
Calculate the energy
of IR radiation with a
wavelength of 996
nm.
8
c = 3.00 x 10 m/s
-34
h = 6.63 x 10 Js
Calculate the mass of
IR radiation with a
wavelength of 996
nm.
8
c = 3.00 x 10 m/s
-34
h = 6.63 x 10 Js
Calculate the volume
of gas released at
o
227 C under 83.1 kPa
when 770 mg of octane
(C8H18) is burned.