Chemistry, 10.03.2021 19:00, levicorey846
What is the mass number of an atom which contains 21 electrons,21 protons and 24 neutrons
Answers: 3
Chemistry, 22.06.2019 13:00, yaneiryx5476
Is 9 correct? and can someone me with 10? itβs due tomorrow, you
Answers: 1
What is the mass number of an atom which contains 21 electrons,21 protons and 24 neutrons...
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