Atomic Mass and Atomic Number Quiz
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Atomic Mass and Atomic Number Quiz

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Questions and Answers

What is the main concept highlighted in the first lecture of Human Biology?

  • The chemical components of cells
  • Chemical bonding of atoms makes molecules (correct)
  • Biological buffering system
  • The importance of Water

    • What is the significance of Carbon in the context of the lecture?

  • It helps in understanding the essential elements for living organisms
  • It is essential for describing the building blocks of a cell
  • It is important for the buffering system of the cell
  • It is a chemical component of cells (correct)

    • Why do biology and cell biology heavily depend on chemistry and physics?

  • To study the components that make up living organisms
  • To discuss real-life problems and solutions
  • To understand molecular structure and chemical reactions of cells (correct)
  • To appreciate physical properties of water

    • Why is understanding the buffering system of the cell important?

    <p>To appreciate cellular structure and function in terms of chemical events</p> Signup and view all the answers

    How does the lecture describe carbohydrates?

    <p>As building blocks that make up the cell</p> Signup and view all the answers

    What facilities are available to deliver the lectures in Human Biology according to the text?

    <p>Daily Quizzes along with PowerPoint slides, videos, and pictures</p> Signup and view all the answers

    What is the definition of atomic mass or atomic weight?

    <p>The sum of protons and neutrons in an atom</p> Signup and view all the answers

    Why is helium used instead of hydrogen in balloons?

    <p>Hydrogen is flammable while helium is not</p> Signup and view all the answers

    What are the three basic components of an atom?

    <p>Protons, neutrons, electrons</p> Signup and view all the answers

    Where are protons and neutrons located within an atom?

    <p>Surrounding the nucleus</p> Signup and view all the answers

    What distinguishes one element from another?

    <p>Atomic number</p> Signup and view all the answers

    What do isotopes refer to in relation to atoms?

    <p>Atoms with different numbers of neutrons but the same number of protons</p> Signup and view all the answers

    What is the attraction between protons and electrons in an atom compared to?

    <p>Attraction between two positively charged magnets</p> Signup and view all the answers

    What determines the distance of electrons from an atom's nucleus?

    <p>The amount of energy the electrons have</p> Signup and view all the answers

    Why are radioisotopes considered unstable?

    <p>They tend to give off radiation and particles to reach a stable state</p> Signup and view all the answers

    Why can radiation emitted by radioisotopes be dangerous to living organisms?

    <p>It can damage tissues by releasing energy and particles</p> Signup and view all the answers

    Which subatomic particle is responsible for the negative charge in an atom?

    <p>Electron</p> Signup and view all the answers

    What property differentiates one element from another?

    <p>Atomic number</p> Signup and view all the answers

    What do electrons tend to do when positioning themselves around the centre of the atom?

    <p>Pair up to form energy levels</p> Signup and view all the answers

    How many electrons can the first orbital or level of an atom contain?

    <p>2</p> Signup and view all the answers

    Which two elements make up over 98% of all living material by weight?

    <p>Carbon and Hydrogen</p> Signup and view all the answers

    What happens when atoms transfer electrons to fill their outermost electron shells?

    <p>They react due to unbalanced electrostatic charges</p> Signup and view all the answers

    Which element from Table-1 has an atomic number of 15?

    <p>Nitrogen</p> Signup and view all the answers

    What is the basis for the vast variety of chemical reactions and chemical bonds that occur in nature?

    <p>Tendency of atoms to fill their outermost electron energy level</p> Signup and view all the answers

    What is the recommended way to add phytochemicals to the diet according to nutritionists?

    <p>Moderately consume foods with phytochemicals</p> Signup and view all the answers

    What phytochemical found in tomatoes, strawberries, and watermelon gives them their red color?

    <p>Lycopene</p> Signup and view all the answers

    Apart from citrus fruits, which other food group mentioned contains Vitamin C and flavonoids?

    <p>Cantaloupes and plums</p> Signup and view all the answers

    What is the main role of antioxidants in the body?

    <p>Preventing damage to cell molecules by free radicals</p> Signup and view all the answers

    Which hormone serves as a natural antioxidant in the body?

    <p>Melatonin</p> Signup and view all the answers

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