Mass number, protons, electrons, neutrons
8:36
Added: 1 year ago
From: chemathdotcom
Views: 9,731
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  • learned more in 8 minutes from a video then 5 weeks in science class. Thank you!!!!!

    Dalekdalektruck28 1 day ago

  • this vid helped me alot lol, thanks!

    TheJester033 2 weeks ago

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

    bellakassy1 2 weeks ago

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

    Thank u so much!!

    brieanna1992 2 weeks ago 2

  • my teacher said

    atomic # - atomic mass

    KJMBlader 3 months ago

  • very clear and great demonstration...

    mrsgilet 5 months ago

  • the mass number of potassium is 39 not 40

    72pinkchevelle 8 months ago

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

    bigmanbarrie1 9 months ago

  • viewer 999 ftw?

    LgdIKILLU 10 months ago

  • NICE!!

    2012boracho 11 months ago

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