suttonfae336
26.02.2021 •
Chemistry
Types of reactions and name then btw i m bored anyone wanna talk
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Ответ:
The sum of the number of protons and neutrons in an atom is called the mass number.
Explanation:
Carbon-12 has 12 protons and 12 neutrons. 12+12=24 , so the mass number of C-12 is 24..
Hope it helps..