2.44 An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.
Given an ion has mass number 56 and possesses three units 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 three units of positive 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: