SHELLS, SUBSHELLS, AND ORBITALS
ORBITALS - are specific regions of space where electrons may exist - The SHAPE of an orbital is defined by the SUBSHELL it is in - The ENERGY of an orbital is defined by both the SHELL the orbital is in AND the kind of SUBSHELL it is in ARRANGEMENT OF SHELLS, SUBSHELLS, AND ORBITALS - Shells are numbered.
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