What is the symbol for the neutral atom that has 58 electrons?
How many electrons are in one neutral atom of Mn - 55?

D:

You should "google" such questions!!
If it is a neutral atom there are as many negative electrons as positive protons.
So which element has 58 protons ?

And how many protons are there in Mn (55) ?
Note that this "55" means protons and neutrons (the way to differentiate between isotopes), so look for Mn and not for 55!!

Use this link to find your answers on the periodic table ! LINK

Success !

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