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Vocab Quiz #1
Term | Definition |
---|---|
atomic number | # protons in the nucleus of an atom |
isotope | An atom with same # protons and a different # neutrons from other atoms of same element |
mass number | Sum of protons in the nucleus of an atom |
model | A diagram that helps explain ideas about the natural world |
atomic mass | Average mass of all isotopes of an element |
period | Horizontal row of elements in the periodic table |
group | Elements in the same vertical column of the periodic table |
chemical symbol | 1 or 2 letter representing of an element |