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chapter 4
Term | Definition |
---|---|
nucleus | a dense positively charged mass located in the center of the atom |
proton | a positively charged subatomic particle |
neutron | a neutral charged subatomic particle |
electron | negatively charged subatomic particle |
atomic number | number of protons in an element |
mass number | |
energy levels | possible energy electrons can have |
electron cloud | most likely places for electrons to be |
oribtal | area of space around the nucleus |
electron configuration | the way electrons are arranged |
ground state | when the electrons in an atom are at its lowest possible energy |
isotopes | atoms of the same element that has a different number of neutrons and different mass numbers |