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Chem Unit 2

Chemistry Unit 2 Vocabulary

TermDefinition
Excited State When an atom has more energy than it has at ground state.
Ground State Lowest energy state in a quantized system.
Ionization Energy Energy required to remove an electron from an atom or ion.
Electronegativity Ability of an atom to attract electrons in a chemical compound.
Electromagnetic Spectrum All frequencies of electromagnetic radiation.
Avogadro's Number The number of atoms or molecules in 1 mole; 6.02 x 1023.
Electron Affinity Energy change when a neutral atom acquires an electron.
Mole SI base unit to measure the amount of substance.
Photon Particle of electromagnetic radiation; unit or quantum of light.
Orbital Where there is a high probability of receiving electrons.
Electron Configuration Arrangement of electrons.
Pauli Exclusion Principle Principle that states two particles of a certain class cannot be in the same exact energy state.
Hund's Rule Singly occupied with one electron before any orbital is doubly occupied, all electrons in singly occupied orbitals spin the same; the number of unpair electrons is the maximum and these unpaired electrons bond between atoms.
Created by: M0rganL
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