MOLE CONCEPT

• atomic mass - weight of an atom
• how to get value of neutron?

  mass number - atomic number
• what is the atomic mass unit or AMU?

  1.66054 x 10^-24 g
• what is the value of mass proton?

  1.00728 amu
• what is the value of mass neutron?

  1.00868
• how to solve for atomic mass?

  mass element = (mass proton x number of protons) + (mass neutron x number of neutrons)
• Atoms and molecules are minute particles, but the mole concept allows you to count these particles
• Special names are used for counting units
• mole - The atomic counting unit
• mole - which comes from Latin word that means “heap” or huge pile
• The mole is equivalent to - 600 HEXILLION
• 6.022 x 10^23 - is called ‘Avogadro number ’s ’ in honor of Italian scientist Amedeo Avogadro
• Amedeo Avogadro - who first suggested that it might be possible to count atoms.
• 1 mol = 6.022 x 10^23