Chemistry
Chemistry, 28.10.2020 01:00, moonk7733

An atom has a mass number of 19 and an atomic number of 9. What element is it? What is its symbol? How many protons, neutrons, and
electrons does it have?

answer
Answers: 3

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An atom has a mass number of 19 and an atomic number of 9. What element is it? What is its symbol?...

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