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Chapter 4 Vocab

TermDefinition
Nucleus A dense, positively charged mass located in the center of the atom.
Proton A positively charged subatomic particle that is found in the nucleus of an atom.
Electron A negatively charged subatomic particle that is found in the space outside the nucleus.
Neutron A neutral subatomic particle that is found in the nucleus of an atom.
Atomic number An element equals the number of protons in an atom of that element.
Mass number The sum of the protons and neutrons in the nucleus of that atom.
Isotopes Atoms of the same element that have different numbers of neutrons and different mass numbers.
Energy levels The possible energies that electrons in a atom can have.
Electron cloud A visual model of the most likely locations for electrons move in an atom.
Orbital A region of space around the nucleus where an electron is likely to be found.
Electron configuration The arrangement of electrons in the orbitals of an atom.
Ground state When all the electrons in an atom have the lowest possible energies.
Created by: lee.mcgrath
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