Chemical Basis Of Life

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Nikoley
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  • 1/9 Questions

    Atomic weight is the number of _____ plus nuetrons in the nucleus

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About This Quiz

Explore the chemical elements vital to human life, their atomic properties, and their roles in biological systems in this engaging quiz.

Chemical Basis Of Life - Quiz

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  • 2. 

    What are the four elements that make up so much of our body

    • Carbon, Oxygen, Zinc and Magnesium

    • Oxygen, Sodium, Carbon and Hydrogen

    • Hydrogen, Oxygen, Carbon and Sodium

    • Nitrogen, Carbon, Oxygen and Hydrogen

    • None of the above

    Correct Answer
    A. Nitrogen, Carbon, Oxygen and Hydrogen
    Explanation
    Nitrogen, carbon, oxygen, and hydrogen are the four elements that make up a significant portion of our body. Nitrogen is a vital component of proteins and nucleic acids. Carbon is the backbone of organic molecules and is involved in various biological processes. Oxygen is necessary for cellular respiration and energy production. Hydrogen is present in water and is involved in many biochemical reactions. These four elements are essential for the structure and function of biological molecules in our body.

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  • 3. 

    If there are 8 protons in the nucleus of an atom how many electrons are there?

    • 8

    • 16

    • 4

    • 7

    • None of the above

    Correct Answer
    A. 8
    Explanation
    The number of electrons in an atom is equal to the number of protons in its nucleus, as atoms are electrically neutral. Since there are 8 protons in the nucleus of the atom mentioned in the question, there must also be 8 electrons.

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  • 4. 

    Four elements make up what percent of the human body 

    • 96%

    • 83%

    • 50%

    • 79%

    • None of the above

    Correct Answer
    A. 96%
    Explanation
    The answer is 96% because the question is asking for the percentage of the human body that is made up of four elements. Since there are no other options or information provided, we can assume that the correct answer is 96%.

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  • 5. 

    True or False: Electrons are part of the atomic weight

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Electrons are not part of the atomic weight because atomic weight is determined by the combined mass of protons and neutrons in an atom's nucleus. Electrons have negligible mass compared to protons and neutrons, so they do not significantly contribute to the atomic weight. Therefore, the correct answer is False.

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  • 6. 

    Which is a subatomic particle?

    • Atom

    • Electron

    • Nucleus

    • Proton

    • Both B and D

    Correct Answer
    A. Both B and D
    Explanation
    Both the electron and proton are subatomic particles. The electron has a negative charge and is found outside the nucleus of an atom, while the proton has a positive charge and is located within the nucleus. Therefore, both options B and D are correct as they both represent subatomic particles.

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  • 7. 

    This compound has little or no carbon to carbon bonds

    • Organic Compound

    • Isotope Compounds

    • Catonic Compounds

    • Inorganic Compound

    • Both A and D

    Correct Answer
    A. Inorganic Compound
    Explanation
    The correct answer is Inorganic Compound. This is because an inorganic compound is characterized by the absence or minimal presence of carbon to carbon bonds. Organic compounds, on the other hand, are primarily composed of carbon and hydrogen atoms and typically contain carbon to carbon bonds. Isotope compounds and cationic compounds do not specifically refer to the absence of carbon to carbon bonds, so they are not the correct answer.

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  • 8. 

    What is the Octet Rule?

    • 4-2-2

    • 2-4-8

    • 2-8-8

    • 2-4-6

    • Both A and C

    Correct Answer
    A. 2-8-8
    Explanation
    The Octet Rule states that atoms tend to gain, lose, or share electrons in order to achieve a full outer shell with eight electrons. This is because having a full outer shell makes atoms more stable. The correct answer, 2-8-8, represents the electron configuration of the noble gas neon (Ne), which has a full outer shell and follows the Octet Rule.

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  • 9. 

    The primary element that forms the chemical basis for all known life on Earth is __________.

    Correct Answer
    Carbon, carbon
    Explanation
    Carbon is the primary element forming the chemical basis for all known life due to its unique ability to form stable bonds with many elements, including itself. This versatility allows for the creation of a vast array of complex molecules essential for life, such as carbohydrates, proteins, lipids, and nucleic acids. Carbon's bonding properties make it the backbone of organic chemistry, which is the foundation of biological processes.

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  • Current Version
  • Jun 17, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 14, 2008
    Quiz Created by
    Nikoley
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