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chapter 4 vocab
Term | Definition |
---|---|
proton | A positively charged subatomic particle that is found in the nucleus of an atom. |
Electron | A negatively charged subatomic particle found in the space around the atom. |
Neutron | A neutral subatomic particle that is found in the nucleus of an atom |
Atomic number | 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 can have in an atom. |
Electron cloud | A visual model of the most likely locations for electrons in an atom. |
orbital | A region of space around the nucleus where an electron is most 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. |