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Chapter 4 vocab.
words from chapter 4
Term | Definition |
---|---|
nucleus | the dense, positively charged mass located in the center of an 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 of an atom |
neutron | a neutral subatomic particle that is found in the nucleus of an atom |
atomic number | a unique number for each element that equals the number of protons in an atom of that element |
mass number | the sum of the number of protons and neutrons in the nucleus of an atom |
isotopes | atoms of a given 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 the electrons 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 | a state in which all the electrons in an atom have the lowest possible energies |