chem(unit 1)

• what is the mass number

  total number of protons and neutrons
• what is the atomic number

  number of protons
• what 2 subatomic particles have the same number

  electrons and protons
• what is an isotope

  atoms with the same amount of protons but different amount of neutrons
• what is the equation for the Ar

  ((mass of 1st isotope x % of 1st isotope)+(mass of 2nd isotope x % of 2nd isotope)) / 100
• what does Ar stand for

  realative atomic mass
• what is the value of a mole

  6.02 x 10 to the power of 23
• what doe the Mr stand for

  relative formula mass
• what is the equation for mass

  mass = moles x formula or atomic mass