Transcript Mid-Year Jeo 1

Jeopardy
Template
By Carl Lyman
© September 2001
Midterm Jeopardy 1
Tools
Matter
Atomic
Naming
100
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200
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300
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300
400
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500
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500
Credits
 That’s all folks.
Exit
Tools $100
A.) 40.3 mL
B.) 43 mL
C.) 43.0 mL
D.) 43.00 mL
Tools $100
C
43.0 mL
Scale is 1 mL and the measurement rule states
that you must estimate one digit beyond the
scale
Tools $200
Write in scientific notation:
36,400
A.) 36.4 x 104
B.) 3.64 x 104
C.) 36.4 x 103
D.) 3.64 x 10-4
Tools $200
B
3.64 x 104
Number in front must be between1 and 10.
Decimal is moved 4 places and the exponent is
positive because the original number is greater
than 1.
Tools $300
How many significant figures are in the
measurement 0.0034 kg?
A.) 1
B.) 2
C.) 4
D.) 5
Tools $300
B
2
Decimal point absent so come from pacific side.
Start counting at the first non zero
0.0034
→
Tools $400
Express the sum of 7.68 m + 5.0 m using
the correct number of significant digits.
A.) 12.68 m
B.) 12.7 m
C.) 13 m
D.) 10 m
Tools $400
B
12.7 m
When adding and subtracting you look at the
decimal position. The number should be
expressed to the tenth position. It is rounded to
12.7 because of the 8 in the hundredth position
for 12.68
Tools $500
Express the product of 2.2 mm x 5.00 mm
using the correct number of significant
digits.
A.) 10 mm
B.) 11 mm
C.) 11.0 mm
D.) 11.00 mm
Tools $500
B
11
When multiplying or dividing you look at significant
digits. Your answer should include 2 significant
digits
Matter $100
Which of the following is a physical
change?
A.) corrosion
B.) explosion
C.) evaporation
D.) rotting of food
Matter $100
C
Evaporation
Phase changes are physical changes. The
composition of the material is not changed, just
the distance between the particles
Matter $200
What is one difference between a mixture
and a compound?
A.) A compound consists of more than one phase.
B.) A compound can only be separated into its components
by chemical means.
C.) A mixture can only be separated into its components by
chemical means.
D.) A mixture must be uniform in composition.
Matter $200
B
A compound can only be separated into its
components by chemical means.
Compounds consist of two or more elements
chemically combined in a fixed ratio and thus
can only be separated by chemical means. A
mixture is a blend of two substances not
chemically combined and can be separated by
physical means
Matter $300
Which of the following is a heterogeneous
mixture?
A.) air
B.) salt water
C.) steel
D.) soil
Matter $300
D
Soil
Heterogeneous mixtures contain identifiably
different components. It does not look of uniform
composition
Matter $400
Which of the following cannot be broken
down by chemical or physical means?
A.) Element
B.) Compound
C.) Homogenous Mixture
D.) Heterogeneous Mixture
Matter $400
A
Element
Elements are made of only one type of atom and
cannot be separated by chemical means,
compounds can. Mixtures can be broken down
by physical means
Matter $500
Which of these elements is not diatomic as
a free element?
A.) nitrogen
B.) hydrogen
C.) boron
D.) chlorine
Matter $500
C
Boron
The 7 diatomic elements are:
HONClBrIF
Atomic $100
In Rutherford's gold foil experiments, some alpha particles
were deflected from their original paths but most passed
through the foil with no deflection. Which statement about
gold atoms is supported by these experimental observations?
A.) Gold atoms consist mostly of empty space
B.) Gold atoms are similar to alpha particles
C.) Alpha particles and gold nuclei have opposite charges
D.) Alpha particles are more dense than gold atoms
Atomic $100
A
Gold atoms consist mostly of empty space
Most particles passed through because they did
not hit anything
Atomic $200
The region labeled "Y" in the diagram has a
charge that is:
A.) positive
B.) negative
C.) neutral
Atomic $200
A
Positive
Y is the nucleus that contains positive protons and
neutral neutrons. X is the negatively charged
electron cloud
Atomic $300
Most of the mass of the atom can be found
in the:
A.) charges
B.) electron cloud
C.) electrons
D.) nucleus
Atomic $300
D
Nucleus
The nucleus contains protons and neutrons, both
with masses of 1 amu. The electron has a mass
of 1/1836, so the electron cloud has very little
mass in its large volume.
Atomic $400
Which atoms are isotopes of the same
element?
Atomic $400
1
Isotopes have the same number of protons (bottom
left), but a different number of neutrons (found by
subtracting the protons from the mass number in
upper left). Both have 12 protons, but one
isotope has 12 neutrons and the other one has
13.
Atomic $500
How many electrons are contained in an
Au+3 ion?
A.) 76
B.) 79
C.) 82
D.) 197
Also determine the number of protons and neutrons
Atomic $500
A
76
Protons are equal to the atomic number: 79
Neutrons are mass (197) – protons (79): 118
Negative electrons are equal to positive protons in
a neutral atom. This atom has a charge of +3,
three too little electrons. 79 – 3 = 76
Naming $100
What is the formula for triphosphorus
pentasulfide?
A.) P5S3
B.) P6S3
C.) P3S5
D.) S4P5
E.) PS3
Naming $100
C
P3S5
Prefixes tell you how many atoms are present. Triis 3 and Penta- is 5. The number is placed as a
subscript to the right of the element symbol
Naming $200
What is the formula for barium hydroxide?
A.) BaOH
B.) BaOH2
C.) Ba(OH)2
D.) Ba(OH)
Naming $200
C
Ba(OH)2
You must assign charges: Ba = +2 and OH = -1.
The charges are crisscrossed: one Ba and 2 OH.
Parentheses are needed because there are 2
OH’s (2 O’s and 2 H’s).
Naming $300
What is the name of the compound
Li2CO3?
A.) dilithium carbonate
B.) dilithium hydrogen carbonate
C.) lithium(I) carbonate
D.) lithium carbonite
E.) lithium carbonate
Naming $300
E
lithium carbonate
Compounds with 3 or more elements contain a
polyatomic ion. It is not a binary compound with
2 nonmetals so prefixes are not used.
Naming $400
What is the formula for tin(IV) chromate?
A.) Sn(CrO4)4
B.) Sn2(CrO4)2
C.) Sn2(CrO4)4
D.) Sn(CrO4)2
Naming $400
D
Sn(CrO4)2
The roman numeral represents the charge on the
metal. Assign charges Sn = 4 and CrO4 = -2.
Crisscross the charges: two Sn and 4 CrO4.
Subscripts must be reduced to lowest whole
number ratio. 2:4 becomes 1:2.
Naming $500
Name the compound CuCO3.
A.) copper carbonate
B.) copper (I) carbonate
C.) copper(II) carbonate
D.) copper(III) carbonate
Naming $500
C
copper (II) carbonate
Compounds with 3 or more elements contain a
polyatomic ion. Copper is a transitions metal
and needs a roman numeral to describe its
charge. It is +2 because the one copper needs
to cancel out the -2 charge on the one carbonate