Chemistry, 13.11.2020 08:00 alexusnicole817
What is the mass number of an atom that has 19 protons, 19 electrons, and 20 neutrons?
Answers: 1
Chemistry, 22.06.2019 13:00, yaneiryx5476
Is 9 correct? and can someone me with 10? it’s due tomorrow, you
Answers: 1
Chemistry, 24.06.2019 08:00, arianawelsh123l
If an atom contains 11 protons and 12 neutrons, what is its mass number?
Answers: 1
What is the mass number of an atom that has 19 protons, 19 electrons, and 20 neutrons?...
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