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  • 1. Chapter 4 Review “Atomic Structure” Pre-AP Chemistry Charles Page High School Stephen L. Cotton
  • 2. Chapter 4 Review
    • All atoms of the same element have the same _____.
    • Know Dalton’s Atomic Theory.
    • An element has an atomic number of 76. What is the number of protons and electrons in a neutral atom of this element?
    • How is the number of neutrons in the nucleus of an atom calculated?
  • 3. Chapter 4 Review
    • All atoms are neutral, with the number of protons equaling the ___.
    • Isotopes of the same element have different _____.
    • Using the periodic table, determine the number of neutrons in 16 O.
    • What does the number 84 represent in the name krypton-84?
  • 4. Chapter 4 Review
    • What is the correct complete symbol for an atom of tritium?
    • Know who discovered the neutron, and in what year.
    • Dalton said that atoms were indivisible and atoms of the same element were identical. Have any changes been made to this?
  • 5. Chapter 4 Review
    • The mass number of an element is equal to _____.
    • The sum of the protons and neutrons in an atom equals the __.
    • What is the purpose of comparing the number of atoms of copper in a coin the size of a penny with the number of people on the earth?
  • 6. Chapter 4 Review
    • The atomic number of an element is the total number of ____.
    • How do the isotopes of hydrogen-1 and hydrogen-2 differ?
    • What hypothesis led to the discovery of the proton?
    • The element Indium has __ protons and ___ electrons.
  • 7. Chapter 4 Review
    • Why did J. J. Thomson reason that electrons must be a part of the atoms of all elements?
    • Isotopes of the same element have different ____.
    • Know characteristics regarding the nucleus of an atom.
    • Are these the same element? 38 ? and 39 ?
  • 8. Chapter 4 Review
    • Describe the model of the atom as a result of Rutherford’s discovery of the nucleus.
    • The smallest particle of an element that retains the properties of that element is a(n) ____.
    • Know the complete symbol for an element, and what it means: X
    20 10
  • 9. Chapter 4 Review
    • What is the relative mass of an electron?
    • The particles that are found in the nucleus of an atom are ____.
    • Know the ideas from Democritus.
    • Who conducted experiments to determine the quantity of charge carried by an electron?
  • 10. Chapter 4 Review
    • How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain?
    • Who was the man who lived from 460 B.C. – 370 B.C. , and was among the first to suggest the idea of atoms?
  • 11. Chapter 4 Review
    • Know the characteristics of subatomic particles.
    • A fictitious element “X” has 10.0 % of the isotope with mass 55 amu, 20.0 % of the isotope with mass 56 amu, and 70.0 % of the isotope with mass 57 amu. Estimate the atomic mass of element X.
  • 12. Chapter 4 Review
    • Element “Z” has two isotopes: one has mass number of 19.0 amu is 55.0 % abundant, and the isotope with mass number 21.0 amu is 45.0 % abundant. What is the average atomic mass for element Z?
    • How many protons are present in an atom of Beryllium-9?
  • 13. Chapter 4 Review
    • Calculate the number of neutrons in Lead-210.
    • Determine the number of electrons in an atom of Iridium.
    • About how many more times massive is a proton than electron?
    • How many neutrons are present in an isotope of uranium-235?
  • 14. Chapter 4 Review
    • What is the atomic number for an element with 41 neutrons and a mass number of 80?
    • Use the periodic table to determine the number of protons in barium.
    • How many protons are present in the nuclei of the three known isotopes of hydrogen?
  • 15. Chapter 4 Review
    • What is the mass number for an oxygen atom that has 10 neutrons in its nucleus?
    • How many electrons are in an atom of gold?
    • What is the total number of subatomic particles in the nucleus of an atom of bismuth-209?
  • 16. Chapter 4 Review
    • Use the periodic table to determine the number of electrons in a neutral atom of lithium.
    End of Chapter 4 Review