atoms of the same element with different numbers of neutrons
isotope
electrons in an atom will occupy the lowest energy orbitals
aufbau principle
includes x-rays, ultra violet rays, and infared radiation
Electro magnetic spectrum
applies to different compounds formed from the same 2 elements
law of multiple proportions
region of space where electrons fly
orbital
orbitals of the same n and l quantum numbers are each occupied by an electron
hund's rule
positively charged particles produced by nuclear disintegration
alpha particle
if an electron requires additional energy
excited state
exact amount of orbitals occupied in an element
Electron configuration
any sample of a compound always has te same composition
law of definite proportion
present in all atomic nuclei: neutral charge
neutron
state of lowest possible energy
ground state
number of particles in a mol
avogadros constant
no more than 2 electron occupy a single orbital
Pauli exclusion principle
positvely charged particle
protron
all matter is made of indivisble particles called atoms
atomic theory
SI unit for amount of a substance
mol
negitive charged particle
electron
mass of an atom
atomic mass
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