Basic Chemistry 基础化学答案2023秋

第二章测试

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:6.8 B:25.6 C:136 D:27.2 E:13.6
答案:D
2.Which statement below correctly describes the responses of alpha, beta, and gamma radiation to an electric field?
A:Alpha and beta are deflected in opposite directions, while gamma shows no response B:Both alpha and beta are deflected in the same direction, while gamma shows no response C:Both alpha and gamma are deflected in the same direction, while beta 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 3.__________ and __________ reside in the atomic nucleus.
A:Protons, electrons B:Neutrons, only neutrons C:Protons, neutrons D:Electrons, neutrons E:none of the above 4.Which one of the following is not true concerning cathode rays?
A:They originate from the negative electrode B:They travel in straight lines in the absence of electric or magnetic fields C:They are made up of electrons D:They impart a negative charge to metals exposed to them E: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:Rutherford gold foil experiment B:cathode ray tube, by J. J. Thompson C:atomic theory of matter D:Millikan oil drop experiment E:Dalton atomic theory 6.In the Rutherford nuclear-atom model, __________.
A:the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass B:the light subatomic particles, protons and neutrons, reside in the nucleus C:the heavy subatomic particles, protons and neutrons, reside in the nucleus D:the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass and mass is spread essentially uniformly throughout the atom E:mass is spread essentially uniformly throughout the atom 7.All atoms of a given element have the same __________.
A:mass B:number of electrons and neutrons C:number of neutrons D:number of protons E:density 8.An atom of the most common isotope of gold, 197Au, has __________ protons, __________ neutrons, and __________ electrons.
A:197, 79, 118 B:79, 118, 118 C:79, 197, 197 D:118, 79, 39 E:79, 118, 79 9.Which combination of protons, neutrons, and electrons is correct for the isotope copper-63, ?
A:29 p+ , 29 n°, 63 e− B:34 p+ , 29 n°, 34 e− C:29 p+ , 34 n°, 29 e− D:34 p+ , 34 n°, 29 e− E:63 p+ , 29 n°, 63 e− 10.Isotopes are atoms that have the same number of __________ but differing number of __________.
A:protons, neutrons B:protons, electrons C:neutrons, protons D:neutrons, electrons E:electrons, protons