Answer
Because the two particles have an equal charge, the charges will cancel out and give the atom an overall charge of 0. So, if at atom has 35 protons in the nucleus, we could expect it to have 35 electrons orbiting that nucleus.
Explanation:
Well....the answer is HCO3....but i don't know what it is said in worded form.
Looking at the names....it is probably Hydrogen Carbonate
Rutherford is the man responsible :)