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Isotopes quiz #1

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  • One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?
    The mass number is the sum of protons and neutrons. For this sodium isotope, it is 11 + 7 = 18.
  • How many neutrons does lithium have if its mass number is 7 and its atomic number is 3?
    Lithium has 7 - 3 = 4 neutrons.
  • How many neutrons does potassium have if its mass number is 39 and its atomic number is 19?
    Potassium has 39 - 19 = 20 neutrons.
  • Which of these refers to atoms with the same atomic number but different atomic masses? Options: A) Isotopes B) Ions C) Molecules D) Compounds
    A) Isotopes
  • How many neutrons make up one of these potassium atoms with a mass number of 39?
    Potassium has 39 - 19 = 20 neutrons.
  • How many neutrons does sodium have if its mass number is 23 and its atomic number is 11?
    Sodium has 23 - 11 = 12 neutrons.
  • How many neutrons are in the nucleus of a potassium atom with a mass number of 39?
    Potassium has 39 - 19 = 20 neutrons.
  • How many neutrons does carbon have if its mass number is 12 and its atomic number is 6?
    Carbon has 12 - 6 = 6 neutrons.
  • An atom with an atomic number of 12 and a mass number of 25 can best be described by which of these? Options: A) Magnesium-25 B) Sodium-25 C) Aluminum-25 D) Silicon-25
    A) Magnesium-25
  • An isotope of sodium (Na) has a mass number of 22. How many neutrons does it have?
    Sodium has 22 - 11 = 11 neutrons.
  • An atom's mass number is 13 and its atomic number is 6. How many neutrons are in its nucleus?
    The atom has 13 - 6 = 7 neutrons.
  • What do carbon-12 and carbon-13 isotopes of carbon have in common?
    They have the same atomic number.
  • What is the difference between diploid and haploid?
    Diploid cells contain two complete sets of chromosomes, while haploid cells contain only one set.
  • How many neutrons make up one of these potassium atoms? Options: A) 19 B) 20 C) 38 D) 58
    B) 20
  • What is the mass number of an atom of potassium that has 20 neutrons?
    The mass number is 19 (protons) + 20 (neutrons) = 39.
  • How many neutrons does this atom have if its mass number is 14 and its atomic number is 6?
    The atom has 14 - 6 = 8 neutrons.
  • What are the atomic number and mass number for the carbon isotope with seven neutrons?
    The atomic number is 6, and the mass number is 6 + 7 = 13.
  • How many neutrons do potassium-39 and potassium-40 have?
    Potassium-39 has 20 neutrons, and potassium-40 has 21 neutrons.
  • How many neutrons are in this lithium atom if its mass number is 7 and its atomic number is 3?
    Lithium has 7 - 3 = 4 neutrons.
  • How many protons are present in an atom of potassium-29?
    Potassium has 19 protons.
  • What is the difference between a diploid cell and a haploid cell?
    Diploid cells have two sets of chromosomes, while haploid cells have one set.
  • How many neutrons does nitrogen-15 have?
    Nitrogen-15 has 15 - 7 = 8 neutrons.
  • How many neutrons does magnesium have if its mass number is 24 and its atomic number is 12?
    Magnesium has 24 - 12 = 12 neutrons.
  • What element would have a mass number of 7 and 3 protons?
    The element is lithium.
  • What is the diploid number of chromosomes in corn?
    The diploid number of chromosomes in corn is 20.
  • How many neutrons are in sodium if its mass number is 23 and its atomic number is 11?
    Sodium has 23 - 11 = 12 neutrons.
  • The haploid number of sphagnum moss is 19. What is its diploid number?
    The diploid number is 19 x 2 = 38.
  • How many neutrons does an atom of sodium-23 have? The symbol for sodium is Na.
    Sodium-23 has 23 - 11 = 12 neutrons.
  • What is the least abundant immunoglobulin (Ig)?
    IgE
  • Which isotope has the same number of neutrons as phosphorus-31?
    Silicon-30
  • How many neutrons are in an atom of carbon-12?
    Carbon-12 has 12 - 6 = 6 neutrons.
  • How many neutrons does sodium (Na) have if its mass number is 23 and its atomic number is 11?
    Sodium has 23 - 11 = 12 neutrons.
  • How many neutrons are in a lithium atom if its mass number is 7 and its atomic number is 3?
    Lithium has 7 - 3 = 4 neutrons.
  • The atomic number of nitrogen is 7. What is the mass number of a nitrogen atom with 6 neutrons?
    The mass number is 7 + 6 = 13.
  • What is the haploid number of chromosomes in corn?
    The haploid number of chromosomes in corn is 10.
  • How many neutrons are in an atom of lithium if its mass number is 7 and its atomic number is 3?
    Lithium has 7 - 3 = 4 neutrons.
  • How many neutrons are in an atom of sodium that has a mass number of 23?
    Sodium has 23 - 11 = 12 neutrons.
  • What element is usually used to date fossils?
    Carbon is usually used to date fossils.
  • What is true about isotopes regarding their neutron numbers?
    Isotopes have different numbers of neutrons.
  • How many neutrons does nitrogen have if its mass number is 14 and its atomic number is 7?
    Nitrogen has 14 - 7 = 7 neutrons.