2.43 An ion with mass number 37 possesses one unit of negative charge. If the ion contains 11.1% more neutrons than the electrons, find the symbol of the ion.
Given an ion has mass number 37 and possesses one unit of negative charge.
Let the number of electrons be then,
the number of neutrons will be:
The number of electrons in the neutral atom (ion possesses one unit of negative charge).
Therefore, the number of protons will be .
Mass number = number of protons + number of neutrons
therefore,
Therefore, the number of protons is equal to the atomic number.
Hence, the symbol for an ion will be: