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10 Cards in this Set

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  • Back
atomic number
number of protons
mass number
number of protons plus number of neutrons
ion
an atom that has lost of gained electrons
atomic weight
the weight in grams of one mole (mol) of a given element and is expressed in terms of g/mol
atomic mass unit (amu)
one amu is defined as exactly 1/12 the mass of the carbon-12 atom
Avogadro's number
6.022 x 10^23 particles
isotope
for a given element, multiple species of atoms with the same number of protons (same atomic #) but different number of neutrons (different mass #) exist
quantum theory
energy emitted as electromagnetic radiation from matter comes in discrete bundles called quanta
atomic emission spectrum
each element can have its electrons excited to different distinct energy levels which can be used as a fingerprint for the element
principle quantum number
denoted by the letter n