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chem

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how many protons, nnutrons, atomic mass, mass number, and charge to each of the following have?

sodium atom
fluorine ion
stannic ion

for sodium i have
protons=11
electrons=11
neutral charge

how do i find the number of neutrons cause im pretty sure mass number is protons plus neutrons

also is this right so far?

  • chem -

    yes, protons + neutrons = mass #
    protons = electrons for NEUTRAL atom

  • chem -

    Na
    protons 11
    neutrons 23-11 = 12
    mass 22.99
    mass number 23
    electrons 11
    atom has neutral charge

  • chem -

    Now for a F ion
    charge is -1, one more electron than proton

    protons 9
    neutrons 19-9 = 10
    mass # = 19
    electrons 9+1 = 10

  • chem -

    okay but why is it -1 charge?

  • chem -

    An electron has charge of -1
    A proton has charge of +1

  • chem -

    Blow me

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