A monatomic ion contains 17 protons and 18 electrons. Enter its charge number as a signed integer.
Ճիշտ պատասխան
-1
Բացատրություն
Subtracting the 18 electrons from the 17 protons gives a charge number of minus 1. Reversing the subtraction gives plus 1 and incorrectly treats the extra electron as positive charge.