Mass number, protons, electrons, neutrons

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Uploaded by on Nov 13, 2010

How to find the Mass number,number of protons, number of electrons, and number of neutrons

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  • made it 100% clear!! unlike my teacher :|

    Thank u so much!!

  • omg he is so good. i wish he was my teacher arrrrgh... i luv it

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All Comments (10)

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  • learned more in 8 minutes from a video then 5 weeks in science class. Thank you!!!!!

  • this vid helped me alot lol, thanks!

  • my teacher said

    atomic # - atomic mass

  • very clear and great demonstration...

  • the mass number of potassium is 39 not 40

  • what is this site? this helped alot i was wondering if i could visit it?

  • viewer 999 ftw?

  • NICE!!

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