Atomic Structure Quiz Questions And Answers

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Zohra Sattar, PhD, Chemistry |
Chemistry Expert
Review Board Member
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products. With her expertise, Dr. Waxali ensures the accuracy and relevance of our chemistry quizzes, contributing to a comprehensive understanding of chemical principles and advancements in the field.
, PhD, Chemistry
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Atomic Structure Quiz Questions And Answers - Quiz


Would you be able to explain atomic structure? Then, take up this quiz with interactive questions and answers and see for yourself. An atom structure consists of a positively charged nucleus surrounded and neutralized by negatively charged electrons circling in orbits at varying distances from the nucleus. The arrangement of electrons contrasts with various chemical elements. The number of electrons is equivalent to the number of protons. You may need to know this information for your exam, and the below quiz can come to your rescue. Let's get started.


Questions and Answers
  • 1. 

    A neutron carries a positive charge.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    A neutron is a subatomic particle that carries no charge. It is electrically neutral, meaning it has no positive or negative charge. This is in contrast to protons, which carry a positive charge, and electrons, which carry a negative charge.

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  • 2. 

    How many atoms of nitrogen are in the formula NH4OH?

    Correct Answer
    1, one
    Explanation
    The formula NH4OH consists of one nitrogen atom.

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  • 3. 

    How many atoms of oxygen are in Sn(SO4)2?

    Correct Answer
    8, eight
    Explanation
    The compound Sn(SO4)2 contains one tin atom (Sn), two sulfate ions (SO4), and two oxygen atoms in each sulfate ion. Each sulfate ion consists of one sulfur atom (S) and four oxygen atoms (O). Therefore, there are a total of 8 oxygen atoms in the compound.

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  • 4. 

    Identify the atomic number of the element of Xenon.

    Correct Answer
    54, fifty four, fifty-four
    Explanation
    The atomic number of an element represents the number of protons in the nucleus of its atoms. In this case, the correct answer is 54, which signifies the atomic number of Xenon. The alternative answers, "fifty four" and "fifty-four," are simply different ways of expressing the same number, without affecting its value or meaning.

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  • 5. 

    The atomic number of an atom is determined by the number of

    Correct Answer
    Protons
    Explanation
    The atomic number of an atom is determined by the number of protons. Protons are positively charged particles found in the nucleus of an atom. Each element has a unique number of protons, which defines its atomic number. This number also determines the element's position in the periodic table. Therefore, the correct answer is protons.

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  • 6. 

    A proton has a charge that is equal in force but opposite in charge of each electron.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because a proton has a positive charge, while an electron has a negative charge. The magnitude of their charges is equal, but they have opposite signs. This means that the force between a proton and an electron is attractive, as opposite charges attract each other. Therefore, the statement is correct.

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  • 7. 

    Protons and electrons are about equal in mass.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Protons and electrons are not about equal in mass. Protons have a mass of approximately 1 atomic mass unit (AMU), while electrons have a mass that is about 1/1836th of an AMU. Therefore, protons are much heavier than electrons.

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  • 8. 

    The mass of an atom depends on the number of protons and neutrons in its nucleus.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The mass of an atom is determined by the number of protons and neutrons in its nucleus. Protons and neutrons have a relatively large mass compared to electrons, so they contribute significantly to the overall mass of the atom. Electrons, on the other hand, have a negligible mass. Therefore, the more protons and neutrons an atom has, the greater its mass will be. This statement is true as it accurately describes the relationship between the mass of an atom and the number of protons and neutrons in its nucleus.

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  • 9. 

    How do you determine the mass number of an atom? 

    • A.

      It is equal to the number of protons

    • B.

      It is equal to the number of protons plus the number of electrons

    • C.

      It is equal to the number of protons plus the number of neutrons

    • D.

      It is equal to the number of electrons plus the number of neutrons

    • E.

      It is equal to the number of protons minus the number of neutrons

    Correct Answer
    C. It is equal to the number of protons plus the number of neutrons
    Explanation
    The mass number of an atom is determined by adding the number of protons and the number of neutrons. This is because protons and neutrons both contribute to the mass of an atom, while electrons have negligible mass compared to protons and neutrons. Therefore, the correct answer is that the mass number is equal to the number of protons plus the number of neutrons.

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  • 10. 

    Atoms of the same element with different numbers of neutrons are called__________.

    • A.

      Isotopes

    • B.

      Ions

    • C.

      Atoms

    • D.

      Either isotopes or ions

    • E.

      None of these are correct

    Correct Answer
    A. Isotopes
    Explanation
    Atoms of the same element with different numbers of neutrons are called isotopes. Isotopes have the same number of protons and electrons, which determine the element, but they differ in the number of neutrons. This difference in neutrons leads to variations in the atomic mass of the isotopes. Isotopes can have different physical and chemical properties due to their varying atomic masses, but they still belong to the same element.

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  • 11. 

    In the name carbon-14, the 14 is the _________________.

    • A.

      Mass number

    • B.

      Atomic number

    • C.

      Oxidation number

    • D.

      Number of electrons

    • E.

      Number of neutrons

    Correct Answer
    A. Mass number
    Explanation
    The correct answer is mass number. The mass number refers to the total number of protons and neutrons in the nucleus of an atom. In the name carbon-14, the 14 represents the mass number, indicating that the carbon atom has 6 protons and 8 neutrons.

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  • 12. 

    An atom that has a different number of electrons and protons is called a(n) _________________.

    Correct Answer
    ion
    Explanation
    An atom that has a different number of electrons and protons is called an ion. Ions are formed when atoms gain or lose electrons, resulting in a net positive or negative charge. The difference in the number of electrons and protons creates an imbalance in the electrical charge of the atom, making it an ion. Ions play a crucial role in chemical reactions and are involved in various biological processes.

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  • 13. 

    Electrons have a ____________ charge.

    Correct Answer
    negative
    Explanation
    Electrons have a negative charge, represented by the symbol "-". The negative charge of electrons is denoted by the negative sign and is essential for understanding the behavior of electrons in various scientific fields, such as physics and chemistry. The charge of -1 indicates that the electron carries a unit negative charge.

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  • 14. 

    Neutrons have a ____________ charge.

    Correct Answer
    neutral
    Explanation
    Neutrons have a neutral charge because they do not possess any positive or negative charge. They are electrically neutral particles, meaning they have an equal number of protons and electrons, resulting in a net charge of zero. Therefore, the options "neutral," "0," and "no" all accurately describe the charge of neutrons.

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  • 15. 

    How many protons are in tin-100?

    Correct Answer
    50, Fifty
    Explanation
    Tin-100 is an isotope of tin, which means it has a specific number of protons. The atomic number of tin is 50, so tin-100 will also have 50 protons. The answer "50" is the numerical representation of the number of protons in tin-100, while "fifty" and "Fifty" are the written forms of the number 50.

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  • 16. 

    How many neutron are in tin-100?

    Correct Answer
    50, Fifty
    Explanation
    Tin-100 is an isotope of tin, which means it has a different number of neutrons compared to the most common form of tin. The atomic number of tin is 50, which represents the number of protons in the nucleus. Since neutrons are particles with no charge, the number of neutrons can vary. However, in the case of tin-100, the isotope name suggests that it has 100 as the mass number. The mass number is the sum of protons and neutrons in the nucleus. Since the atomic number is 50, it means that there are 50 neutrons in tin-100.

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  • 17. 

    Is tin-100 a common isotope?

    • A.

      Yes

    • B.

      No

    Correct Answer
    B. No
    Explanation
    Tin-100 is not a common isotope of tin. It is a radioactive isotope with a relatively short half-life and is not found in significant quantities naturally. The most abundant isotopes of tin in nature are tin-112, tin-114, tin-115, tin-116, tin-117, tin-118, tin-119, and tin-120, making tin one of the elements with the largest number of stable isotopes. Tin-100 is more commonly studied in nuclear physics research rather than being a commonly encountered isotope in everyday materials or natural settings.

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  • 18. 

    What is the charge on an atom with 10 protons and 8 electrons?

    Correct Answer
    +2
    positive 2
    positive two
    2+
    Explanation
    The charge on an atom is determined by the difference between the number of protons and the number of electrons. In this case, there are 10 protons and 8 electrons. Since protons have a positive charge and electrons have a negative charge, the atom has an overall positive charge. The difference between the number of protons and electrons is 2, so the charge is +2 or positive 2.

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Zohra Sattar |PhD, Chemistry |
Chemistry Expert
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products. With her expertise, Dr. Waxali ensures the accuracy and relevance of our chemistry quizzes, contributing to a comprehensive understanding of chemical principles and advancements in the field.

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