Atomic Number, Mass Number, and Net Electric Charge

This video explains how to calculate the atomic number, the mass number, and the net electric charge given the number of protons, electrons, and neutrons, It also explains how to identify the element. This video also discusses the difference between the isotopic mass number and the average atomic mass.

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[leonardobarrera]

7:56
I don't know chemestry, but on the Carbon Atom, it is not switch, I a mean A=6 and Z=13???
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[pbzrg]

is the number of proton still the same as the atomic number if the atom is negatively charged?

[Jake-fs]

What happens to electrons in the “Protons + Neutrons = Mass Number”