Today is Tuesday,
th
October 6 , 2015
Pre-Class:
Today we are reviewing.
Have your questions ready!
Today’s Agenda
• Review
– In the form of worksheets
– In the form of a game
Review Game Rules
• I will ask a question to the class.
• Each participant (that’s you) writes down the
answer silently.
– Not each group…each individual.
• After a few moments, I will say, “Compare
answers.”
• Each of you will look at what the other wrote.
Review Game Rules
• Did you each get the right answer?
– 2 points.
• Did one of you get the right answer?
– 1 point.
• Neither of you?
– For shame. 0 points.
– And eternal guilt.
Review Game Rules
• The List of Do Nots:
– Do not talk to each other, make noises, gesture,
give answers (my discretion here) between when
the question has been read and when I say,
“Compare answers.”
• Doing so will result in a disqualification for that round.
Don’t believe me? Try it.
– Do not fall asleep when I’m getting scores.
• If you’re not paying attention, I’m not giving you points.
Review Question 1
• What unit do scientists use to measure
frequency? Hint: It’s on most radios…
– Hertz (Hz).
Review Question 2
• If the atomic number of silver is 47 and the
mass number is 85, how many protons does
the typical silver atom have?
– 47 protons.
Review Question 3
• If the atomic number of silver is 47 and the
mass number is 85, how many neutrons does
the typical silver atom have?
– 38 neutrons.
Review Question 4
• Find calcium on your periodic tables. How
many valence electrons does it have?
– 2 valence electrons (both in the s sublevel).
Review Question 5
• What is calcium’s valence shell principal
quantum number?
– n=4
Review Question 6
• What is calcium’s valence shell electron
configuration?
– 4s2
Review Question 7
• BONUS NON-CHEMISTRY QUESTION
• You may wager any/all of your points.
• Category: Movies
• What is the only movie sequel to win an
Academy Award for Best Picture?
– The Godfather – Part II
Review Question 8
• From the following list, pick the two elements
that have the same outermost energy level (n
number):
• Copper, Bismuth, Neon, Helium, Silver,
Neodymium, Uranium
– Bismuth (Bi) and Neodymium (Nd)
Review Question 9
• Of the following, which has the highest
ionization energy:
• Gallium, Phosphorous, Potassium, Titanium,
Aluminum.
– Phosphorous (P)
Review Question 10
• Of the following, which TWO are part of the
Pauli Exclusion Principle?
A.
B.
C.
D.
Only two electrons per orbital
Fill energy levels from lowest to highest
One electron per orbital until each have one
Electrons in the same orbital must spin in
opposite directions
A. Only two electrons per orbital.
D. Electrons in the same orbital must spin in opposite
directions.
Review Question 11
• BONUS NON-CHEMISTRY QUESTION
• You may wager any/all of your points.
• Category: Sports
• Between MLB Baseball, NHL Hockey, and NFL
Football, only one city has a team in each league
with the same two main uniform colors. Which?
– Pittsburgh (Pirates, Penguins, Steelers are all black and
gold)
Review Question 12
• How many valence electrons do halogens
have?
–7
Review Question 13
• Halogens:
A.
B.
C.
D.
Lose electron(s) to become anions
Lose electron(s) to become cations
Gain electron(s) to become anions
Gain electron(s) to become cations
C. Halogens gain an electron which creates an anion.
Review Question 14
• What is the noble gas electron configuration
of nickel?
– [Ar] 4s2 3d8
Review Question 15
• How many sublevels are there in the n=5
energy level AND what are their letters?
– 4: s, p, d, f
Review Question 16
• More electronegative atoms:
A.
B.
C.
D.
E.
Attract electrons strongly by themselves
Repel electrons strongly by themselves
Attract electrons strongly in compounds
Repel electrons strongly in compounds
Attract electrons weakly in compounds
C. More electronegative atoms attract electrons strongly
in compounds.
Review Question 17
• Without using a calculator, calculate the
approximate atomic mass of a vanadium atom
if 90% of its atoms have a mass of 50 amu and
10% of its atoms have a mass of 52 amu. Will
the atomic mass be closest to:
• 50; 51; 52
– 50. A non-weighted average would be 51, but
with 90% of atoms weighing just 50 amu, the
weighted average must be closer to 50.
Review Question 18
• BONUS NON-CHEMISTRY QUESTION
• You may wager any/all of your points.
• Category: Animals
• What is the world’s fastest animal?
– Peregrine falcon (up to 200 mph dives – called
“stoops”)
Review Question 19
• What specific ionic charge would you expect
to find on an atom of boron?
– 3+
Review Question 20
• If you increase frequency, what happens to
wavelength and energy?
A.
B.
C.
D.
Energy goes up, wavelength goes down
Energy goes up, wavelength goes up
Energy goes down, wavelength goes down
Energy goes down, wavelength goes up
A. If frequency is increased, energy increases while
wavelength decreases.
Review Question 21
• How many electrons are present in the
valence shell of helium?
– 2.
Review Question 22
• How many electrons are present in the
valence shell of scandium?
– 2.
Review Question 23
• Which element is this?
• [Xe] 6s2 5d1
– Lanthanum.
Review Question 24
• Which subatomic particle best determines the
chemical behavior of an atom?
– Electrons.
Review Question 25
• What is the name for the energy required to
remove an electron from an atom that has
already lost one?
– Second ionization energy.
Review Question 26
• How many electrons in any given atom could
have the following set of quantum numbers?
• n=4, l=2, ml=2
•
•
•
•
2.
n=4 tells you we are looking at 2n2 = 32 e-.
l=2 tells you it’s a d sublevel (4d), so 10 e-.
ml=2 tells you it’s one of the 5 d orbital
orientations, meaning 2 e-.
Review Question 27
• What is the frequency of radiation whose
wavelength is 650 nm? C = 2.998 x 108 m/s
•
•
•
•
650 nm = 0.00000065 m
c = 
2.998 x 108 = 0.00000065
 = 4.6 x 1014 Hz