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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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Steptim Steptim
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10 years ago
Give the A)Element Symbol, Atomic Number, Mass Number, Number of Protons, Total electrons and Number of Neutrons for: Manganese – 55 and Carbon - 14
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10 years ago
Hi Steptim,

For an atom, the number of electron equal to the number proton. Therefore, Manganese atom has 25 electrons, and Carbon atom has 6 electron.
For the number of neutron, you have to take that mass indicated next to the atom's name minus the number of proton that atom has. For example. Manganese-55 atom has a mass of 55 amu and it has 25 protons. Therefore Manganese-55 has 55-25= 30 neutron. Similarly, Carbon-14 has 14-6= 8 neutrons.

Hope this helps,
Laser
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