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C371 Unit 3
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Questions in this quiz (27)
1Analysis of which pair of substances could be used to illustrate the law of multiple proportions?
- ASO2 , H2SO4
- BCrF2, CrF3
- CH2O , O2
- DNaCl , KCl
2A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement of __________.
- Athe law of multiple proportions
- Bthe law of constant composition
- Cthe law of conservation of mass
- Dthe law of conservation of energy
3Which one of the following is NOT one of the postulates of Dalton's atomic theory?
- AAtoms are composed of protons, neutrons, and electrons.
- BAll atoms of a given element are identical; the atoms of different elements are different and have different properties.
- CAtoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither created nor destroyed in chemical reactions.
- DCompounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms.
4Which of the following is NOT true concerning cathode rays?
- AThey originate from the negative electrode called the cathode
- BThey would not be visible if there were no gas at all in the tube
- CThe characteristics of cathode rays depend on the material from which they are emitted.
- DThey travel in straight lines in the absence of electric or magnetic field
55. Isotopes are atoms that have the same number of ____ but different number of ______
- Aprotons, electrons
- Bneutrons, protons
- Cprotons, neutrons
- Delectrons, protons
6Which statement below correctly describes the responses of alpha, beta, and gamma radiation to an electric field?
- ABoth beta and gamma are deflected in the same direction, while alpha shows no response.
- BBoth alpha and gamma are deflected in the same direction, while beta shows no response.
- CBoth alpha and beta are deflected in the same direction, while gamma shows no response.
- DAlpha and beta are deflected in opposite directions, while gamma shows no response.
7Which of the following is a correct interpretation of the results of Rutherford’s experiments in which gold atoms were bombarded with alpha particles?
- AElectrons in atoms are negative.
- BAtoms consist mostly of empty space
- CThe positive charge of an atom is found in a small dense region.
- DElectrons are attracted to the heavy positively charged alpha particles.
8The charge on the electron, was determined in the ____
- Acathode ray tube, by J.J. Thomson.
- BRutherford gold foil experiment.
- CMillikan oil drop experiment.
- DDalton atomic theory.
9All isotopes of a particular element must have the same
- Amass
- Bnumber of protons
- Cnumber of neutrons
- Dnumber of protons and neutrons
1010. There are ______ electrons, _______ protons, and ______ neutrons in an atom of 134/54 Xe
- A54, 54, 78
- B54, 54, 77
- C54, 54, 132
- D78, 78, 54
11Of the choices below, which one is NOT an ionic compound?
- APCl5
- BMoCl6
- CRbCl5
- DPbCl2
12Silver has two naturally occurring isotopes with the following isotopic masses
= 106.90509 = 108.9047
The fractional abundance of the lighter of the two isotopes is closest to- A.25
- B.45
- C.55
- D.75
13When a metal and a nonmetal react, the _______ tends to lose electrons and the ______ tends to gain electrons.
- Ametal, metal
- Bnonmetal, nonmetal
- Cmetal, nonmetal
- Dnonmetal, metal
14Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties?
- AC , Pb
- BO, S
- CK , Ca
- DH , He
15Elements in group 1A are known as _____
- Achalcogens
- Balkaline earth metal
- Chalogens
- Dalkali metals
16Elements in group 7A are known as _____
- Achalcogens
- Balkaline earth metal
- Chalogens
- Dalkali metals
17Which one of the following does NOT occur as diatomic molecules in elemental form?
- Aoxygen
- Bsulfur
- Chydrogen
- Dnitrogen
18The molecular formula of a compound is always _________ the empirical formula
- Amore complex than
- Bdifferent from
- Ca whole number multiple of
- Dthe same as
1922. Which of these experiments led to a deeper understanding of the nature of the electron?
I. Cathode Ray Tube
II. Gold Foil Experiment
III. Oil Drop Experiment- AI only
- BII only
- CI and II only
- DI and III only
2023. Which pair of atoms contain the same number of neutrons?
- A35Cl and 37Ar
- B32S and 37Cl
- C30Si and 32S
- D31P and 30P
2124. Of the three types of radioactivity characterized by Rutherford, which are not particles?
- Aβ-rays
- Bα-rays and β-rays
- Cα-rays
- Dγ-rays
2225. Of the following, which contains the greatest number of electrons?
- AP3+
- BP
- CP2−
- DP3−
2327. Element X reacts with sodium to form an ionic compound with the formula Na3X. Element X must be a member of which group?
- A1A
- B3A
- C5A
- D6A
2428. A certain nonmetallic element forms a compound with gallium having the general formula Ga2X3 Element X is a member of which group?
- A6A
- B2A
- C3A
- D5A
2529. The elements of which group are most likely to form ions by losing two electrons?
- A1A
- B2A
- C3A
- D5A
26Ba(OH)2 _______________________________
- Abariumhydro
- Bbarium hydroxide
- Cbarium dihidroxide
27H2SO4
- Adihydrogen sulfuricpentaoxide
- Bsulfuric acid
- Chydrogen sulfur oxygen
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- Quiz on C371 Unit 3 , created by eli corniel on 04/10/2021.
- Author
- eli corniel
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- English
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