First 20 Elements Flashcards
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Questions and Answers

What is the number of protons in Hydrogen (H)?

  • 3
  • 1 (correct)
  • 2
  • 4
  • What is the number of neutrons in Helium (He)?

  • 1
  • 2 (correct)
  • 0
  • 4
  • What is the number of electrons in Lithium (Li)?

  • 4
  • 3 (correct)
  • 5
  • 6
  • How many protons are in Beryllium (Be)?

    <p>4</p> Signup and view all the answers

    What is the neutron count in Boron (B)?

    <p>5</p> Signup and view all the answers

    How many neutrons does Carbon (C) have?

    <p>6</p> Signup and view all the answers

    What is the number of protons in Nitrogen (N)?

    <p>7</p> Signup and view all the answers

    What is the number of neutrons in Oxygen (O)?

    <p>6</p> Signup and view all the answers

    How many neutrons are in Fluorine (F)?

    <p>10</p> Signup and view all the answers

    What is the number of protons in Neon (Ne)?

    <p>10</p> Signup and view all the answers

    How many neutrons does Sodium (Na) have?

    <p>12</p> Signup and view all the answers

    What is the number of protons in Magnesium (Mg)?

    <p>12</p> Signup and view all the answers

    What is the number of neutrons in Aluminium (Al)?

    <p>14</p> Signup and view all the answers

    What is the proton count in Silicon (Si)?

    <p>14</p> Signup and view all the answers

    How many protons does Phosphorus (P) have?

    <p>15</p> Signup and view all the answers

    What is the number of neutrons in Sulfur (S)?

    <p>16</p> Signup and view all the answers

    How many neutrons does Chlorine (Cl) have?

    <p>18</p> Signup and view all the answers

    What is the number of protons in Argon (Ar)?

    <p>18</p> Signup and view all the answers

    How many neutrons does Potassium (K) have?

    <p>20</p> Signup and view all the answers

    What is the number of protons in Calcium (Ca)?

    <p>20</p> Signup and view all the answers

    Study Notes

    First 20 Elements Overview

    • Hydrogen (H): 1 proton, 1 electron, 0 neutrons
    • Helium (He): 2 protons, 2 electrons, 2 neutrons
    • Lithium (Li): 3 protons, 3 electrons, 4 neutrons
    • Beryllium (Be): 4 protons, 4 electrons, 5 neutrons
    • Boron (B): 5 protons, 5 electrons, 6 neutrons
    • Carbon (C): 6 protons, 6 electrons, 6 neutrons
    • Nitrogen (N): 7 protons, 7 electrons, 7 neutrons
    • Oxygen (O): 8 protons, 8 electrons, 8 neutrons
    • Fluorine (F): 9 protons, 9 electrons, 10 neutrons
    • Neon (Ne): 10 protons, 10 electrons, 10 neutrons
    • Sodium (Na): 11 protons, 11 electrons, 12 neutrons
    • Magnesium (Mg): 12 protons, 12 electrons, 12 neutrons
    • Aluminium (Al): 13 protons, 13 electrons, 14 neutrons
    • Silicon (Si): 14 protons, 14 electrons, 14 neutrons
    • Phosphorus (P): 15 protons, 15 electrons, 16 neutrons
    • Sulfur (S): 16 protons, 16 electrons, 16 neutrons
    • Chlorine (Cl): 17 protons, 17 electrons, 18 neutrons
    • Argon (Ar): 18 protons, 18 electrons, 22 neutrons
    • Potassium (K): 19 protons, 19 electrons, 20 neutrons
    • Calcium (Ca): 20 protons, 20 electrons, 20 neutrons

    Key Information

    • Elements are identified by the number of protons in their nucleus, which is equal to the number of electrons in a neutral atom.
    • Neutrons contribute to the atomic mass but do not affect the charge of the atom.
    • Carbon, with 6 of each particle, is essential for life and forms the basis of organic chemistry.
    • Neon, Argon, and Helium are noble gases, known for their lack of reactivity due to having full electron shells.
    • Elements like Sodium and Potassium are alkali metals, which are highly reactive, especially with water.
    • Calcium plays a crucial role in biological systems, particularly in bone formation and cellular processes.

    Groups of Elements

    • Lightest elements include Hydrogen and Helium.
    • Transition to heavier elements sees gradual increases in neutrons with heavier elements having more stability.
    • Nonmetals dominate the beginning of the list, with metals becoming more common in higher atomic numbers.
    • Each element's properties influence its usage in various industries and biological systems.

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    Test your knowledge of the first 20 elements of the periodic table with this flashcard quiz. Each card provides essential information about protons, electrons, and neutrons. Perfect for anyone studying chemistry or preparing for exams.

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