Studied by 16 people
nucleus
where protons and neutrons are found
protons
positive charge
atomic number
number of protons in the nucleus
neutrons
atoms with no charge
isotopes
atoms of the same element that have different number of neutrons
quarks
smaller particles of protons and neutrons
electrons
negative charge
electron shell
layers that surround the nucleus
ion
an atom that has electric charge
anion
negative charge ion
cation
positive charge ion
mass number
total number of protons and neutrons
atomic mass unit
measures atom’s mass
average atomic mass
average mass of isotopes
quantum theory
tiny particles do not absorb or release energy in a smooth flow
bohr model
shows electrons surrounding nucleus in circles
wave-mechanical model
shows electron wave around nucleus
heisenberg uncertainty principle
it's impossible to know both the position and velocity of an electron at the same time
electron-cloud model
electron as dots surrounding the nucleus
orbitals
electrons move unpredictability through regions of space
quantum (4) numbers
represents overall motion of each electron
pauli exclusion principle
no two electrons in an atom can have the same four quantum numbers
Note 
Flashcard (53)