Specific charge

  • Thread starter Simon1234
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Hello, i have recently started doing AS level physics and i don't understand specific charge.
My textbook stated ' An ion of Magnesium isotope (24 nucleon number, 12 proton number) has a charge of +3.2 x 10(to the power of negative 19) Coulombs.
The charge of a proton is : 1.60 x 10(to the power of negative 19)
As the ion has 12 protons in the nucleus, why isn't the charge (1.60 X 10^-19) x 12?
If anybody could explain it would be much appreciated:)
 

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  • #2
ZapperZ
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Hint: if it isn't an ion, the net charge would be zero. You are forgetting the electrons surrounding the nucleus.

Zz.
 
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Ohh, so is the relative charge of the ion +2?
 

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