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Question

What is the mass number of zinc?


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Solution

Step 1. Formula for mass number:

Massnumber(A)=numberofprotons(Z)+numberofneutrons(n)

Step 2. Mass number of zinc (Zn):

  • The number of protons in Zinc is 30.
  • The number of neutrons in Zinc is 35.
  • So using the above formula, the mass number of zinc =30+35=65

Thus, the mass number of zinc is 65.


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