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第一章 单元测试
1、
Solids have a __________ shape and are not appreciably __________.
A:sharp, convertible
B:indefinite, compressible
C:indefinite, incompressible
D:definite, incompressible
E:definite, compressible
答案: definite, compressible
2、
The symbol for the element potassium is __________.
A:S
B:Ca
C:P
D:Pt
E:K
答案: K
3、
The SI unit for mass is __________.
A:
pound
B:
kilogram
C:
gram
D:
troy ounce
答案:
kilogram
4、
The temperature of 25°C is __________ in kelvins.
A:166
B:248
C:298
D:103
E:138
答案: 298
5、
The density of silver is 10.5 g/cm3. A piece of silver with a mass of 61.3 g would occupy a volume of __________ cm3.
A:644
B:5.84
C:10.5
D:0.171
E:0.00155
答案: 5.84
6、
The correct result of the molecular mass calculation for H2SO4 is ________. 4 × 15.9994 + 32.066 + 2 × 1.0079
A:98.079
B:98.84
C:98.838
D:98.08
E:98.074
答案: 98.079
7、
There are __________ significant figures in the answer to the following computation: (29.2 – 20.0) (1.79 × 105)/1.39
A:3
B:1
C:4
D:5
E:2
答案: 2
8、
Of the following, __________ is the smallest mass.
A:25 kg
B:2.5 × 1010 ng
C:2.5 × 109 fg
D:2.5 × 10-2 mg
E:2.5 × 1015 pg
答案: 2.5 × 109 fg
9、
Accuracy refers to __________.
A:how close a measured number is to infinity
B:how close a measured number is to other measured numbers
C:how close a measured number is to the calculated value
D:how close a measured number is to the true value
E:how close a measured number is to zero
答案: how close a measured number is to the true value
10、
In which one of the following numbers are all of the zeros significant?
A:100.09009
B:0.003002
C:0.14329
D:0.1
E:0.05843
答案: 100.09009
第二章 单元测试
1、
A certain mass of carbon reacts with 13.6 g of oxygen to form carbon monoxide. __________ grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions?
A:136
B:25.6
C:27.2
D:6.8
E:13.6
答案: 27.2
2、
Which statement below correctly describes the responses of alpha, beta, and gamma radiation to an electric field?
A:Both alpha and gamma are deflected in the same direction, while beta shows no response
B:Both alpha and beta are deflected in the same direction, while gamma shows no response
C:Alpha and beta are deflected in opposite directions, while gamma shows no response
D:Both beta and gamma are deflected in the same direction, while alpha shows no response
E:Only alpha is deflected, while beta and gamma show no response
答案: Alpha and beta are deflected in opposite directions, while gamma shows no response
3、
__________ and __________ reside in the atomic nucleus.
A:Protons, neutrons
B:none of the above
C:Neutrons, only neutrons
D:Protons, electrons
E:Electrons, neutrons
答案: Protons, neutrons
4、
Which one of the following is not true concerning cathode rays?
A:They impart a negative charge to metals exposed to them
B:They originate from the negative electrode
C:The characteristics of cathode rays depend on the material from which they are emitted
D:They are made up of electrons
E:They travel in straight lines in the absence of electric or magnetic fields
答案: The characteristics of cathode rays depend on the material from which they are emitted
5、
The charge on an electron was determined in the __________.
A:Millikan oil drop experiment
B:cathode ray tube, by J. J. Thompson
C:atomic theory of matter
D:Rutherford gold foil experiment
E:Dalton atomic theory
答案: Millikan oil drop experiment
6、
In the Rutherford nuclear-atom model, __________.
A:the heavy subatomic particles, protons and neutrons, reside in the nucleus
B:the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass and mass is spread essentially uniformly throughout the atom
C:mass is spread essentially uniformly throughout the atom
D:the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass
E:the light subatomic particles, protons and neutrons, reside in the nucleus
答案: the heavy subatomic particles, protons and neutrons, reside in the nucleus
7、
All atoms of a given element have the same __________.
A:number of neutrons
B:number of electrons and neutrons
C:mass
D:number of protons
E:density
答案: number of protons
8、
An atom of the most common isotope of gold, 197Au, has __________ protons, __________ neutrons, and __________ electrons.
A:79, 118, 118
B:79, 118, 79
C:79, 197, 197
D:197, 79, 118
E:118, 79, 39
答案: 79, 118, 79
9、
Which combination of protons, neutrons, and electrons is correct for the isotope copper-63, ?
A:63 p+ , 29 n°, 63 e−
B:34 p+ , 29 n°, 34 e−
C:34 p+ , 34 n°, 29 e−
D:29 p+ , 34 n°, 29 e−
E:29 p+ , 29 n°, 63 e−
答案: 29 p+ , 34 n°, 29 e−
10、
Isotopes are atoms that have the same number of __________ but differing number of __________.
A:protons, neutrons
B:neutrons, electrons
C:electrons, protons
D:protons, electrons
E:neutrons, protons
答案: protons, neutrons
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