Physics, 03.02.2021 18:20 krystabrewer3

Which of the following elements has a mass number of 19 and contains 10 neutrons? A. potassium (K)
B. neon (Ne)
O c. fluorine (F)
D. copper (Cu)

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Which of the following elements has a mass number of 19 and contains 10 neutrons? A. potassium (K)<...