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Chapter 4 Vocab
Science
Term | Definition |
---|---|
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 | 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 an atom can have. |
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 | The state when all the electrons in an atom have the lowest possible energies. |