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What ? is The mass number (also mass number Called)?
Lösung: This Number of (must By the way, One whole Number be!) corresponds to The Amount The Protons and Neutrons One of them Atoms. Or Just a minute.:
Anzahl(p) + Anzahl(n) = mass number
This Number of can from to the (small) common Periodic system NICHT Readings will be. The mass number is According to the definition on top Left side At the same time, Symbol of the element.Example: 13C be given. There you go. The Speech of 'C' (So what do you mean? Carbon) is, Weiss It's, that 6 Protons of which: be must be. (All of them Carbon atom has by Definition 6 Protons). From The Difference between 13 and 6 Calculated The Commission The Number of The Neutrons: 7. This means that:
Number of Protons = 6
Number of Neutrons = 7
mass number = 13
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