a copper atom has 29 electrons
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a copper atom has 29 electrons
number of electrons in copper atom
electrons in copper atom
copper has how many electrons
how many electrons does copper have
the element copper has 29 protons
number of electrons in copper
copper number of protons and electrons
how many outer electrons does copper have
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a copper atom has 29 electrons, number of electrons in copper atom, electrons in copper atom, copper has how many electrons, how many electrons does copper have, the element copper has 29 protons, number of electrons in copper, copper number of protons and electrons, how many outer electrons does copper have, how many protons and electrons in copper, how many atoms in copper, number of atoms in copper