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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)
B. neon (Ne)
O c. fluorine (F)
D. copper (Cu)

User Denislav
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8.2k points

1 Answer

8 votes
D cause I took the test
User Jason Sherman
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