2024知到答案 Basic Chemistry 基础化学 最新智慧树满分章节测试答案
第一章 单元测试
1、单选题：
Solids have a __________ shape and are not appreciably __________.
选项：
A:sharp, convertible
B:definite, incompressible
C:indefinite, incompressible
D:indefinite, compressible
E:definite, compressible
答案: 【definite, compressible】
2、单选题：
The symbol for the element potassium is __________.
选项：
A:K
B:Ca
C:Pt
D:P
E:S
答案: 【K】
3、单选题：
The SI unit for mass is __________.
选项：
A:gram
B:kilogram
C:troy ounce
D:pound
答案: 【kilogram】
4、单选题：
The temperature of 25°C is __________ in kelvins.
选项：
A:138
B:298
C:248
D:103
E:166
答案: 【298】
5、单选题：
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.
选项：
A:0.171
B:0.00155
C:10.5
D:644
E:5.84
答案: 【5.84】
6、单选题：
The correct result of the molecular mass calculation for H2SO4 is ________. 4 × 15.9994 + 32.066 + 2 × 1.0079
选项：
A:98.079
B:98.08
C:98.074
D:98.838
E:98.84
答案: 【98.079】
7、单选题：
There are __________ significant figures in the answer to the following computation: (29.2 - 20.0) (1.79 × 105)/1.39
选项：
A:1
B:2
C:3
D:4
E:5
答案: 【2】
8、单选题：
Of the following, __________ is the smallest mass.
选项：
A:25 kg
B:2.5 × 109 fg
C:2.5 × 10-2 mg
D:2.5 × 1010 ng
E:2.5 × 1015 pg
答案: 【2.5 × 109 fg】
9、单选题：
Accuracy refers to __________.
选项：
A:how close a measured number is to infinity
B:how close a measured number is to the calculated value
C:how close a measured number is to other measured numbers
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、单选题：
In which one of the following numbers are all of the zeros significant?
选项：
A:0.05843
B:0.003002
C:0.1
D:100.09009
E:0.14329
答案: 【100.09009】
第二章 单元测试
1、单选题：
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?
选项：
A:27.2
B:25.6
C:6.8
D:136
E:13.6
答案: 【27.2】
2、单选题：
Which statement below correctly describes the responses of alpha, beta, and gamma radiation to an electric field?
选项：
A:Both alpha and gamma are deflected in the same direction, while beta shows no response
B:Both beta and gamma are deflected in the same direction, while alpha shows no response
C:Both alpha and beta are deflected in the same direction, while gamma shows no response
D:Only alpha is deflected, while beta and gamma show no response
E:Alpha and beta are deflected in opposite directions, while gamma shows no response
答案: 【Alpha and beta are deflected in opposite directions, while gamma shows no response】
3、单选题：
__________ and __________ reside in the atomic nucleus.
选项：
A:Neutrons, only neutrons
B:Protons, electrons
C:Electrons, neutrons
D:Protons, neutrons
E:none of the above
答案: 【Protons, neutrons】
4、单选题：
Which one of the following is not true concerning cathode rays?
选项：
A:They travel in straight lines in the absence of electric or magnetic fields
B:They are made up of electrons
C:They impart a negative charge to metals exposed to them
D:They originate from the negative electrode
E:The characteristics of cathode rays depend on the material from which they are emitted
答案: 【The characteristics of cathode rays depend on the material from which they are emitted】
5、单选题：
The charge on an electron was determined in the __________.
选项：
A:Dalton atomic theory
B:Millikan oil drop experiment
C:cathode ray tube, by J. J. Thompson
D:atomic theory of matter
E:Rutherford gold foil experiment
答案: 【Millikan oil drop experiment】
6、单选题：
In the Rutherford nuclear-atom model, __________.
选项：
A:the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass and mass is spread essentially uniformly throughout the atom
B:mass is spread essentially uniformly throughout the atom
C:the light subatomic particles, protons and neutrons, reside in the nucleus
D:the heavy subatomic particles, protons and neutrons, reside in the nucleus
E:the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass
答案: 【the heavy subatomic particles, protons and neutrons, reside in the nucleus】
7、单选题：
All atoms of a given element have the same __________.
选项：
A:number of electrons and neutrons
B:mass
C:density
D:number of protons
E:number of neutrons
答案: 【number of protons】
8、单选题：
An atom of the most common isotope of gold, 197Au, has __________ protons, __________ neutrons, and __________ electrons.
选项：
A:118, 79, 39
B:79, 118, 79
C:79, 197, 197
D:197, 79, 118
E:79, 118, 118
答案: 【79, 118, 79】
9、单选题：
Which combination of protons, neutrons, and electrons is correct for the isotope copper-63, ?
选项：
A:29 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:63 p+ , 29 n°, 63 e−
答案: 【29 p+ , 34 n°, 29 e−】
10、单选题：
Isotopes are atoms that have the same number of __________ but differing number of __________.
选项：
A:electrons, protons
B:protons, electrons
C:protons, neutrons
D:neutrons, electrons
E:neutrons, protons
答案: 【protons, neutrons】