Transcript Ch 3 Jeopardy Review Game

Final
Atomic Scientists Nuclear Particles Potpourri
Model
Chem
100
100
100
100
100
200
200
200
200
200
300
300
300
300
300
400
400
400
400
400
500
500
500
500
500
100 Atomic Model
Name the apparatus used to
discover the electron
Answer
Atomic Model 100
Cathode ray tube
200 Atomic Model
Name the scientist who
discovered the electron. Name
the atomic model that was a
result of this discovery.
Answer
Atomic Model 200
J. J. Thomson
Plum Pudding Model
300 Atomic Model
What conclusion can be drawn from
the fact that most of the alpha
particles passed straight through the
foil in the Gold Foil Experiment?
Answer
Atomic Model 300
An atom is mostly empty
space.
400 Atomic Model
What conclusion can be drawn from
the fact that a few of the alpha
particles were deflected by (bounced
back from) the foil in the Gold Foil
Experiment?
Answer
Atomic Model 400 Answer
Atoms have a small, dense,
positive nucleus.
500 Atomic Model
Draw and label the Plum Pudding
Model.
Answer
Atomic Model 500 Answer
100 Scientists
Name the scientist who used the
Oil Drop Experiment to
determine the charge on an
electron.
Answer
Scientists
100 Answer
Millikan
200 Scientists
• Describe three of Marie
Curie’s unique
accomplishments as a
scientist.
Answer
Scientists 200 Answer
• Helped discover radioactivity.
• Discovered and named two new
elements.
• First woman to earn a Nobel Prize.
• First person to win 2 Nobels.
• Established use of X-Rays in
WWI.
300 Scientists
Name the discoverer of the
neutron.
Answer
Scientists 300
James Chadwick
400 Scientists
Describe two corrections to
Dalton’s 1808 Atomic Theory.
Answer
Scientists 400 Answer
• Atoms are divisible (they are made
of smaller particles)
• Atoms of same element can have
different masses (isotopes)
• Atoms can be created and
destroyed (nuclear chemistry)
500 Scientists
Name the scientists credited with the
discovery of radioactivity.
Explain how this discovery changed
the idea of the “indivisible” atom.
Answer
Scientists 500 Answer
Henri Becquerel, Marie Curie, Pierre
Curie
The fact that something can be emitted
from the atom indicated that it must
have subatomic particles.
100 Nuclear Chem
A 4.00 g sample of Francium-
210 decays to a 1.00 g
sample in 5.2 min. What is
the t1/2 of this isotope?
Answer
Nuclear Chem 100 Answer
4.00 g to 2.00 g in one half
life
2.00 g decays to 1.00 g in
nd
2 half life
5.2/2 = 2.6 min= t1/2
200 Nuclear Chem
• What type of radioactive decay results
in energy only being emitted from the
nucleus?
Answer
Nuclear Chem 200
• Gamma decay – emits gamma rays
300 Nuclear Chem
Write the nuclear chemical
equation for the beta decay of
rubidium-90.
Answer
Nuclear Chem 300 Answer
400 Nuclear Chem
Write the nuclear symbol of the
new element produced when
Neptunium-237 (Np) undergoes
alpha decay.
Answer
Nuclear Chem 400 Answer
500 Nuclear Chem
What scientist discovered the
nucleus of the atom and later the
proton?
Name and label the new model
generated from this discovery.
Nuclear Chem 500
Ernest Rutherford
Planetary Model
electron in orbit
dense, positive nucleus
empty space
100 Particles
Name the particle that has about
the same mass as a proton but no
electric charge.
Answer
Particles 100 Answer
Neutron
200 Particles
Write the complete nuclear symbol
for the particle that has
48 protons
64 neutrons
46 electrons
Answer
Particles 200 Answer
300 Particles
Give the number of protons,
neutrons and electrons in
potassium-40.
Answer
Particles
300 Answer
19 protons
21 neutrons
19 electrons
400 Particles
Give the number of protons
neutrons and electrons for
the most abundant isotope
of
B3Answer
Particles 400
5 protons
6 neutrons
8 electrons
500 Particles
Name the force which holds
together the particles in the
nucleus.
Explain why it is strange to us.
Answer
Particles 500
Nuclear Force
It is strange because like
charges usually repel, yet
many positive charges are
held together in small space.
100 Potpourri
For the Electron Cloud Model,
name the scientist credited with
its discovery and explain the
many tiny dots.
Answer
Potpourri 100
Schrodinger
Dots represent probability of locating an
electron in a particular region. Where
the dots are densest, an electron is
more likely to be found. Where there
are few or no dots, an electron is
unlikely.
200 Potpourri
Give two reasons why the Bohr
Model is invalid.
Answer
Answers for Potpourri 200
1. It is impossible to predict a specific
location and momentum (energy)
for an electron. (Heisenberg
Uncertainty Principle)
2. The math does not correspond to
data for any atom other than H
(one electron)
300 Potpourri
Name the two main regions of the
atom.
Which region occupies most of the
volume of the atom?
Which region has most of the atom’s
mass?
Answer
Potpourri 300
• The two regions are the nucleus and the
electron cloud.
• The electron cloud constitutes most of the
volume of the atom and is mostly empty
space.
• The nucleus contains most of the atom’s
mass.
400 Potpourri
A reaction between 46 g of
sodium and 71g of chlorine will
produce how much salt (NaCl)?
Answer
Potpourri 400 Answer
117 g
(Law of Conservation of Mass)
500 Potpourri
Give chemical formulas of two
compounds which support the Law
of Multiple Proportions.
Answer
Potpourri 500 Answer
• CO2 and CO
• Also, N2O and N2O4
• (Same elements can combine in different whole
number ratios to form different compounds)
Final Jeopardy
Draw and explain the Indivisible Atom
Model.
Who first described this model?
Answer
Final Jeopardy Answer
It is a solid sphere with no smaller parts inside.
First proposed by Democritus (Greeks) 400 BC