Atomic Mass Concept

• 1 g = 6.02 x 10^23 amu
• One atomic mass unit is the mass equal to one-twelfth of the mass of one carbon-12 atom
• Isotopes are a type or variant of an atom (element)
• Isotopes can occur naturally or be artificiallyproduced.
• Percent abundance also known as relative abundance
• Percent abundance refers to the percentage of a particular isotope found in a naturally or artificially occurring sample of an element in our planet.
• Average Atomic Mass refers to the sum of the atomic masses of the isotopes of an element, each multiplied by its percent abundance.
• Formula mass - used for compounds having ionic bond.
• Molecular mass - used for compounds containing molecules or having covalent bond.