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The Atom Miege

law of conservation of mass the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
atom the smallest unit of an element that maintains the chemical properties of that element
nuclear forces the interaction that binds protons and neutrons
atomic number the number of protons in the nucleus of an atom
average atomic mass the weighted average of the mass of all naturally occurring isotopes of an element
mass number the sum of the numbers of protons and neutrons in the nucleus of an atom
electromagnetic spectrum all of the frequencies or wavelenghts of electromagnetic radiation
excited state a state in which an atom has more energy than it does at its ground state
frequency the number of cycles or vibrations per unit of time; also the number of waves produced in a given second of time
ground state the lowest energy state of a quantizied system
wavelength the distance from any point on a wave to an identical point on the next wave
Heisenberg Uncertainty Principle the principle that states that determining both the position and velocity of an electron or any other particle simultaneously is impossible
orbital a region in an atom where there is high probability of finding electrons
quantum numbers a number that specifies the properties of electrons
quantum theory the study of the structure and behavior of the atom and of subatomic particles from the view that all energy comes in tiny indivisible bundles
Aufbau principle the principle that states that the structure of each successive element is obtained by adding one proton to the nucleus of the atom and one electron to the lowest-energy orbital that is available
element is obtained by adding one proton to the nucleus of the atom and one electron to the lowest-energy orbital that is available.
electron configuration the arrangement of electrons in an atom
Hund's rule the rule that states that for an atom in the ground state the number of unpaired electorns is the maximum possible and those unpaired electrons have the same spin
noble gases an outer main energy level fully occupied by eight electrons
Created by: mrsafi