Electron is the produced element having the symbol e, its mass number is zero and atomic number is -1.
What is beta minus reaction?
It is type of nuclear reaction in which a beta particle or an electron with no mass is ejected.
In the question subscript of Hg is asked, and in the place of subscript atomic number will come and the atomic number of mercury is 80. It will be notated as [tex]\[{}_{{\rm{80}}}^{{\rm{203}}}{\rm{Hg}}\][/tex].
As in the superscript masses are written and in the subscript atomic number is written and no. of superscript and subscript is always equal on both the sides. We know that in this decay an electron will emit, so the symbol of the produced element is e. And equation can be written as:
[tex]\[{}_{{\rm{80}}}^{{\rm{203}}}{\rm{Hg}} \to {}_{{\rm{81}}}^{{\rm{203}}}{\rm{Hg + }}{}_{\rm{x}}^{\rm{y}}{\rm{e}}\][/tex]
Calculation for the superscript:
As we know that in the superscript masses are written, so the mass of electron is y and it has value of 0, which can be calculated as follow-
203 = 203 + y
y = 0.
Calculation for the subscript:
As we know that in the subscript atomic number are written, so the atomic number of electron is x and it has value of -1, which can be calculated as follow-
80 = 81 + x
x = 80 - 81 = -1
Hence, the element symbol produced is electron, has a mass number zero and an atomic number -1.
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