Calculate the number of neutrons in dipositive zinc ion (Zn2+, the mass number being 70).
No. of neutrons
= Mass number - Atomic number
Atomic mass of zinc is 70 g
Atomic number of Zinc is 30. Thus, number of neutrons will be,
No. of neutrons = 70 - 30 = 40
Find the number of electrons in K+ ion and Cl- ion (Z for K = 19, CI = 17).
Number of electrons in K+ = 19 - 1 = 18
Number of electrons in Cl- =17+1 = 18
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