A Quiz On Isotopes and atomic numbers

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| By Tanya Mishra
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Tanya Mishra
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Quizzes Created: 606 | Total Attempts: 1,156,769
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A Quiz On Isotopes And Atomic Numbers - Quiz

We welcome you to this super fun Isotopes and atomic numbers quiz! By definition, atomic number is an atom's total amount of protons. In contrast, an Isotope is a variation of the element with the same atomic number but a different mass number. These compounds are an essential topic in the chemical sciences. Do you think you know enough about them? Wouldn't it be super fun to take a quiz and test your knowledge about it? Will you be able to pass the quiz with flying colors? Please give it a go! All the best!


Questions and Answers
  • 1. 

    What's the atomic number of oxygen? 

    • A.

      12

    • B.

      8

    • C.

      22

    • D.

      45

    Correct Answer
    B. 8
    Explanation
    The atomic number of an element represents the number of protons in the nucleus of its atom. In the case of oxygen, the atomic number is 8, which means that an oxygen atom has 8 protons. This number is unique to oxygen and helps to identify it on the periodic table.

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  • 2. 

    This metal is found in a liquid state at room temperature. The atomic number of the metal is 80. What's the name of the element? 

    • A.

      Zinc

    • B.

      Iron

    • C.

      Mercury

    • D.

      Cadmium 

    Correct Answer
    C. Mercury
    Explanation
    Mercury is the correct answer because it is the only metal among the options that is found in a liquid state at room temperature. Zinc, iron, and cadmium are all solid metals at room temperature. Additionally, the given atomic number of 80 corresponds to the element mercury, further confirming the correct answer.

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  • 3. 

    What is the name of the isotope known as hydrogen 3? 

    • A.

      Protium

    • B.

      Deuterium

    • C.

      Tritium

    • D.

      None of the above

    Correct Answer
    C. Tritium
    Explanation
    Tritium is the name of the isotope known as hydrogen 3. It is an unstable and radioactive form of hydrogen, containing one proton and two neutrons in its nucleus. Tritium is used in various applications, such as in nuclear weapons, as a tracer in biological and environmental studies, and as a fuel in fusion reactions. It is not protium or deuterium, which are stable isotopes of hydrogen with different numbers of neutrons. Therefore, the correct answer is tritium.

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  • 4. 

    Which of the following metal has the most number of stable isotopes?

    • A.

      Silver

    • B.

      Tin

    • C.

      Magnesium

    • D.

      Iron

    Correct Answer
    B. Tin
    Explanation
    Tin has the most number of stable isotopes compared to the other metals listed. Isotopes are variants of an element that have the same number of protons but different numbers of neutrons. Tin has 10 stable isotopes, which means it has 10 different forms with different neutron numbers that are stable and do not decay over time. In comparison, Silver has only 2 stable isotopes, Magnesium has 3 stable isotopes, and Iron has 4 stable isotopes. Therefore, Tin has the highest number of stable isotopes among the given metals.

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  • 5. 

    The element is represented by the letter K. What's its atomic number? 

    • A.

      22

    • B.

      44

    • C.

      19

    • D.

      4

    Correct Answer
    C. 19
    Explanation
    The element represented by the letter K has an atomic number of 19. The atomic number of an element corresponds to the number of protons in the nucleus of its atom. In this case, the element with atomic number 19 is potassium (K).

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  • 6. 

    What's the atomic number of hydrogen?

    • A.

      1

    • B.

      11

    • C.

      22

    • D.

      44

    Correct Answer
    A. 1
    Explanation
    The atomic number of an element represents the number of protons in the nucleus of its atom. Hydrogen has an atomic number of 1, indicating that it has one proton in its nucleus. This makes hydrogen the simplest and lightest element on the periodic table.

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  • 7. 

    Do you know what's the atomic number of gold? 

    • A.

      12

    • B.

      33

    • C.

      43

    • D.

      79 

    Correct Answer
    D. 79 
    Explanation
    Gold has an atomic number of 79. The atomic number represents the number of protons in the nucleus of an atom. Since gold has 79 protons, its atomic number is 79.

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  • 8. 

    Radium is an enormously radioactive element found in the periodic table. Do you know its atomic number? 

    • A.

      88

    • B.

      23

    • C.

      84

    • D.

      98

    Correct Answer
    A. 88
    Explanation
    Radium is an element with an atomic number of 88. The atomic number represents the number of protons in the nucleus of an atom, and each element has a unique atomic number. Therefore, the correct answer is 88.

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  • 9. 

    What is the atomic number of carbon? 

    • A.

      1

    • B.

      3

    • C.

      6

    • D.

      16

    Correct Answer
    C. 6
    Explanation
    The correct answer is 6 because the atomic number of an element represents the number of protons in the nucleus of its atoms. Carbon has 6 protons, so its atomic number is 6.

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  • 10. 

    Xenon is amongst the rarest gas present in the earth's atmosphere. Do you know the atomic number of xenon? 

    • A.

      65

    • B.

      54

    • C.

      76

    • D.

      87

    Correct Answer
    B. 54
    Explanation
    Xenon is a rare gas found in the earth's atmosphere, and its atomic number is 54.

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  • Current Version
  • Aug 16, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 14, 2022
    Quiz Created by
    Tanya Mishra
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