A proton is an atom that has lost a valence electron and therefore has more positive protons than Negative electrons so it is positively charged
Answer: atomic number Z, gives the proton number of an element and it is unique for all elements ( i.e no two elements have the same atomic number or proton number) if the atom of the element is electrically neutral, the atomic number can also be the electron number
Explanation:
Answer
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The correct answer would be: Atoms
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