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30 Oct 2021

Given information

Here the number of neutrons present in the phosphorous isotope is:

Number of neutrons    

We have to determine the isotopic symbol of phosphorous.

Step-by-step explanation

Step 1.

In the isotopic symbol of the form (X-A), 'X' represents the chemical element and 'A' indicates the mass number.

Here the atomic number of phosphorus is and the number of neutrons is and we have to find out the mass number of phosphorus to represent the isotopic symbol.

The sum of atomic number(Z) and neutrons (N) of an atom is called the mass number (A) and it can be shown as:

   

Hence the mass number of phosphorus with neutrons is:

   

   

Hence the isotopic symbol of phosphorous with  neutrons is found to be  .

 

 

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Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944

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