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Atomic  Structure
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  • 1. Atoms
    • All substances are made from atoms.
    • There are about 100 different types of atoms
    • An element is a substance which contains only one type of atom
  • 2. The Periodic Table The Periodic Table
  • 3. Element, Compound, Mixture Element, Compound, Mixture
  • 4. Structure of an Atoms
    • Atoms have a small central nucleus containing protons and neutrons
    • Electrons orbit the nucleus
    • Protons, neutrons and electrons have different masses and charges
    Structure of an Atom
  • 5. Atomic Structure Atomic structure
  • 6. Atomic Structure Atomic structure
  • 7. Atomic Number
    • The atomic number is the number of protons in the nucleus
    • In an atom, the number of electrons always equals the number of protons
    • Atoms do not have an overall electrical charge
    Atomic number
  • 8. Atomic Number Atomic number
  • 9. Mass Number
    • The mass number is the total number of protons and neutrons in an atom
    • The number of neutrons can be calculated by subtracting the atomic number from the mass number
    Mass number
  • 10. Mass Number Mass number
  • 11. Calculations Calculations
  • 12. Isotopes
    • Isotopes are atoms of the same element that have different numbers of neutrons (e.g. carbon-12 and carbon-14)
    • Isotopes have the same atomic number but different mass numbers
  • 13. Isotopes Isotopes
  • 14. Electrons
    • Each electron in an atom is at a particular energy level (or shell)
    • Electrons fill the lowest energy levels first (nearest to the nucleus)
    • The first shell can take a maximum of 2 electrons, the second shell can take 8, and the third shell can take 8
  • 15. Electron shells Electron Shells
  • 16. Electron arrangements Electron arrangements
  • 17. Wordsearch Wordsearch
  • 18. Quiz Quiz