Transcript Jeopardy_Chapter 3 (see directions Unit 1 above)

Parts and
pieces
People
Laws and
Postulates
+ - huh?
Experiment Radioactivi
s
ty
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Category 1
Category 2
Category 3
Category 4
Category 5
Category 6
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Final Jeopardy
Final Jeopardy
Category
Final Jeopardy
Rutherford proposed the nuclear or "solar system" model, in which negatively charged electrons move around a tiny, massive,
positively charged nucleus. This model replaced Thomson's plum-pudding model, in which positive and negative charges were
evenly distributed throughout the atom. Rutherford's gold-foil experiment (which showed that most alpha particles fired at a gold
foil pass right through without deflection) led him to conclude that the atom is mostly empty space. The fact that a few of the
positively charged alpha particles are deflected greatly indicated that a small part of the atom-the nucleus-contains all its positive
charge and most of its mass.
Compare Rutherford's model of
the atom to Thomson's model by
drawing their models. Label all
the parts. Explain
Rutherford's experiment to
develop his model. (Click 3
times for answer.)
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atom
The smallest particle of an
element that retains the
chemical identity of that
element
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XGa p+31 n039 e34 ?
x
70
-3
31
+
P=
o
n=
X=
e=
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1, 0
What is the approximate
atomic mass of a neutron and
an electron, in amu?
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197 grams
How many grams of gold
would I need to have 1 mole
of gold?
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Ion and Isotope
Unequal number of protons
and electrons and a change in
neutrons
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democritus
Who discovered atomos
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Rutherford
Discovered the core of the
atom is positive
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Dalton
Teacher who made 4
postulates
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Thomson
This person used cathode rays
to create the plum pudding
model
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Rutherford
Called the core of the atom
the nucleus
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Law of constant composition
The law where carbon
dioxide always contains 73
percent oxygen by mass is an
illustration of
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Plumb pudding model
A goo of positiveness with
negative particles distributed
throughout
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Electrons are outside a positive nucleus
(came up with the term nucleus for the first
time)
Describes Rutherford’s model
of the atom
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A=mass Z= atomic number
In the model what does A
and Z stand for?
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Radioactive source, Beta, Gamma, Alpha
What are a,b,c,d
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Spectral lines that indicated electrons
traveled in specific orbits with specific # of
electrons.
Bohr discovered
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The electron
Thomson (using a cathode
ray ) discovered
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Ben Franklin
The scientist who first
suggested that the structure of
atoms is related to electricity
was
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neutrons
Atomic number subtracted
from Atomic mass
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electrons
What subatomic particle is
equal to -3 if proton value is
three less.
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2+
This is a charge of an alpha
particle
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Atomic number
An element's identity is based
on its
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Strong force or strong nuclear force
The force that holds protons
together
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Towards the positive plate
If electrically charged plates
were placed above and below
the cathode ray tube, in what
direction, if any, would they
deflect a beam of cathode
rays?
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From cathode to anode
In the cathode ray tube shown
operating in Figure 3-1, what is the
general direction of the cathode ray
beam? (hint: Cathode (-) and Anode
(+))
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Helium atom with 2+ charge and mass of 4
Explain an alpha particle
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ANS: 210 = mass number of unknown + 4; mass number of unknown = 210 –
4 = 206
84 = atomic number of unknown + 2; atomic number of unknown = 84 – 2 =
82
Element 82 is lead (Pb), so the missing symbol is Pb
Balance the following nuclear
equation and write the
missing symbol.
Po —>X + He
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24 protons and 28 neutrons 21 electrons
Using a periodic table,
determine the number of
protons, neutrons, and
electrons in the ion .
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answer
Balance the following nuclear
equation. Be sure to give the
symbol, with superscript and
subscript, for the missing
nucleus or particle:
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Write a balanced nuclear
equation for the beta decay
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Daily
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The Jeopardy champion!