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Chapter 2 - Atomic structure
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| A | B |
|---|
| mass of a proton | 1 amu |
| mass of a neutron | 1 amu |
| mass of an electron | essentially 0 amu |
| charge of a proton | +1 |
| charge of a neutron | 0 |
| charge of an electron | -1 |
| location of protons | nucleus |
| location of neutrons | nucleus |
| location of electrons | electron cloud, orbitals |
| number of protons | atomic number |
| number that defines an element | atomic number |
| sum of the protons and neutrons | mass number |
| atoms of the same element that have different numbers of neutrons | isotopes |
| atoms of the same element that have different masses | isotopes |
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