What is the atomic number and the mass number of an atom with 29 protons, 36 neutrons and 29 electrons?
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Answer:
copper
Explanation:
In natural copper, the atoms are of two kinds. One has 29 protons and 34 neutrons in the nucleus; the other has 29 protons and 36 neutrons (Figure 4). The two different kinds of atom are called isotopes of copper.
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