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Unit 2

Chemistry

TermDefinition
EXCITED STATE a state in which an atom has more energy than it does at its ground state
GROUND STATE the lowest energy state of a quantized system
IONIZATION ENERGY the energy required to remove an electron from an atom or ion
ELECTRONEGATIVITY the ability of an atom in a chemical compound to attract electrons
ELECTROMAGNETIC SPECTRUM all of the frequencies or wavelengths of electromagnetic radiation
AVOGADRO'S NUMBER 6.02x1023 the number of atoms or molecules in 1 mole
ELECTRON AFFINITY the energy change when an electron is acquired by a neutral atom
MOLE the SI base unit to measure the amount of the substance
PHOTON a unit or quantum of light; particle of electromagnetic radiation
ORBITAL a region in an atom where there is a high probability of finding electrons
ELECTRON CONFIGURATION the arrangement of electrons in an atom
PAUL EXCLUSION PRINCIPLE the principle that states that two particles of a certain class cannot be in exactly the same energy state
HUND'S RULE singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin; the number of unpaired electrons is the maximum possible and these unpaired electrons bonds between atoms
Created by: catelyn.orendi