6.11 Random Questions Units 1-5

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| By Harry Brielmann
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Harry Brielmann
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Quizzes Created: 13 | Total Attempts: 6,197
| Attempts: 145
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  • 1/10 Questions

    What is chemistry?

    • The study of chemicals
    • The study of matter and how it changes
    • The art of mixing chemicals together and the determination of the products that form
    • A measure of the compatibility between two people
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About This Quiz

This quiz titled '6.11 random questions units 1-5' explores foundational concepts in Chemistry, such as the discovery of the electron, electron configuration, and basic chemical properties. It assesses understanding through historical experiments and definitions critical to the field.

6.11 Random Questions Units 1-5 - Quiz

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  • 2. 

    What is a substance?

    • A single chemical or a mixture of chemicals

    • Two or more atoms bonded together

    • Any small sample which has been chemically investigated

    • A pure form of matter

    Correct Answer
    A. A pure form of matter
    Explanation
    A substance is a pure form of matter.
    It many be a single element or atom (in which case there are no bonds), it cannot be a mixture.

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  • 3. 

    Which observation is an example of a physical property?

    • Dynamite explodes

    • Meat rots if it is not refrigerated

    • Gasoline burns

    • Ice floats on top of liquid water

    • A silver platter tarnishes

    Correct Answer
    A. Ice floats on top of liquid water
    Explanation
    all are forming new substances except the ice floating- no chemical change there.

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  • 4. 

    The electron was first proposed to exist based primarily on the results of which experiment?

    • Thomson's cathode ray tube experiment

    • Rutherford's gold foil experiment

    • Bohr's interpretation of the balmer formula

    • Frankensteins Transylvania experiments with lightning and corpses

    Correct Answer
    A. Thomson's cathode ray tube experiment
    Explanation
    Thomson correctly interpreted the cathode ray tube as containing a beam of electrons based on its magnetic and physical properties, the most important being that the beam consisted of particles one thousand times less massive than a hydrogen atom.

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  • 5. 

    How many significant figures are there in the following number? 40

    • 4

    • 3

    • 2

    • 1

    Correct Answer
    A. 1
    Explanation
    The zero here is also insignificant because it only tells how far away from the decimal point the 4 is. Had there been a decimal point, there would have been two significant figures.

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  • 6. 

    Which key experiment or observation resulted in the concept that electrons reside in shells?

    • Thomson's cathode ray tube experiment

    • Rutherford's gold foil experiment

    • Bohr's interpretation of the Balmer Formula as it relates to atomic emission spectra

    • Professor Utonium's experiments with chemical x. leading to the creation of the power puff girls

    Correct Answer
    A. Bohr's interpretation of the Balmer Formula as it relates to atomic emission spectra
    Explanation
    The Balmer formula predicts the sharp wavelengths of light created by ionized hydrogen gas. Balmer interpreted the two integers required to solve the formula as inner and outer shell that an electrons passes between that creates those precise wavelengths of light.

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  • 7. 
    Name the organic functional group in the substance below - ProProfs

    Name the organic functional group in the substance below

    • Alkene

    • Alkyne

    • Alcohol

    • Ketone

    • Ether

    • Aldehyde

    Correct Answer
    A. Ketone
    Explanation
    a carbonyl group (C=O) with carbons on either side is a ketone

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  • 8. 

    Which ion has 50 electrons? 

    Correct Answer
    A.
    Explanation
    An atom of tin has 50 electrons, but it is not an ion. The antimony cation has 50 electrons and is an ion, not an atom.

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  • 9. 
    How many protons, neutrons, and electrons are in the following ion?  - ProProfs

    How many protons, neutrons, and electrons are in the following ion? 

    • Ten protons, eleven neutrons, twelve electrons

    • Eleven protons, twelve neutrons, thirteen electrons

    • 12 protons, 11 neutrons, eleven electtons

    • 11 protons, 12 neutrons, ten electrons

    • 11 protons, 10 neutrons, 12 electrons

    Correct Answer
    A. 11 protons, 12 neutrons, ten electrons
    Explanation
    sodium always has eleven protons; 12 neutrons are needed since the mass number is 23, and the positive charge means one electron has been lost.

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  • Current Version
  • Aug 08, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 07, 2014
    Quiz Created by
    Harry Brielmann
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