Answer: The ion formed is [tex]_{34}^{80}\textrm{Se}^{2-}[/tex]
Explanation:
An ion is formed when an atom looses or gains electron.
Atomic number is defined as the number of protons or electrons that are present in a neutral atom.
Atomic number = number of protons = number of electrons
Atomic mass is defined as the sum of number of protons and neutrons that are present in an atom.
Atomic mass = Number of protons + Number of neutrons
The isotopic representation of an atom is: [tex]_Z^A\textrm{X}[/tex]
where,
Z = Atomic number of the atom
A = Mass number of the atom
X = Symbol of the atom
We are given:
Number of protons = 34
Number of neutrons = 46
Atomic Mass = 34 + 46 = 80
Number of electrons = 36
As, the number of electrons is more than the number of protons, it forms negative ion
Hence, the ion formed is [tex]_{34}^{80}\textrm{Se}^{2-}[/tex]
