Isotopes

• What are isotopes?

  Atoms of the same element with different neutrons
• How do isotopes of the same element differ?

  They have different numbers of neutrons
• What is the significance of different isotopes for an element?

  They have different masses and properties
• What is the notation for isotopes?

  Element symbol with mass number
• How many isotopes does hydrogen have?

  Three isotopes
• What are the isotopes of hydrogen?

  $^1H$, $^2H$, and $^3H$
• What are the characteristics of isotopes?

  • Same number of protons
  • Different number of neutrons
  • Different atomic masses
  • Can have different chemical properties
• What is the mass of the isotope $^1H$?

  1 atomic mass unit
• What is the mass of the isotope $^2H$?

  2 atomic mass units
• What is the mass of the isotope $^3H$?

  3 atomic mass units
• What does the term "isotopes" refer to in chemistry?

  Different versions of the same element