isotopes

• Isotopes

  Different versions of an element or different versions of a certain kind of atom
• Atomic number

  Number of protons in the nucleus
• Mass number

  Number of protons plus neutrons in the nucleus
• Isotope notation

  1. Chemical symbol

  2. Atomic number

  3. Mass number
• Isotopes have the same number of protons but different numbers of neutrons
• Isotope notation includes the chemical symbol, atomic number, and mass number
• • The average atomic mass of an element can be calculated by multiplying the percent abundance of an isotope by its mass.
• • When recording an element, we need to  be aware of which isotope we are using, so we record it using isotopic notation.
• Percent abundance:the percent value of the number of isotopes