What element has 19 protons?
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Calcium has an atomic number of 20, so it has 20 protons. Finding the number of neutrons in an element is slightly more difficult. The number of neutrons present corresponds to the element's mass number less the number of protons in the element. read more
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Electrons carry a negative charge and protons carry a positive charge. Therefore, if an atom is to be neutral it must have equal numbers of protons and neutrons. Consequently, if an atom has 19 protons and is neutral it must have 19 electrons. read more
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