Quantitative Chemistry

• What is the mass number?

  The sum of protons and neutrons in an atom
• What is are isotopes?

  Atoms of the same element with different numbers of neutrons
• What is the atomic number?

  The number of protons in an element
• What is the equation for % mass?

  % mass = Mass of an atom in a formula/total mass of all atoms X 100
• What is a yield?

  The mass of a product obtained
• What is the equation for % yield?

  % yield = Actual mass/Theoretical mass X 100