dense, positively charged mass in the center of an atom.
Positively charged subatomic particle found in the nucleus.
Neutral subatomic particle found in the nucleus.
number of protons in the nucleus of an atom.
sum of the protons and neutrons in the nucleus of an atom.
atoms of the same element having different numbers of neutrons.
possible energies that electrons in an atom can have.
Term for an atom whose electrons have the lowest possible energies
Region of space where an electron is likely to be found.
Visual model of the most likely locations for electrons in an atom.
Arrangement of elections in the orbitals of and atom.
atoms that have the ability to spontaneously and continuously decay.
Arrangement of atoms by increasing atomic number.
Groups of atoms.
Substances that cannot be broken down unto any other substances.
Pure substances that are produced when elements combine.
An atom or molecule which has lost or gained one or more electrons, giving it a positive or negative electrical charge.
The science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems.
Breaking down or breaking apart.
negatively charged subatomic particle which orbits outside of the nucleus.