CIE A Level Physics复习笔记23.1.2 Nuclear Equations

Representing Simple Nuclear Reactions

  • Nuclear reactions can be represented by balanced equations of nuclei in the AZX form

11.1.3-AZX-Notation

AZX notation for atomic nuclei

  • The top number A represents the nucleon number or the mass number
    • Nucleon number (A) = total number of protons and neutrons in the nucleus
  • The lower number Z represents the proton or atomic number
    • Proton number (Z) = total number of protons in the nucleus

Worked Example

WE-Representing-Simple-Nuclear-Reactions-question-image

Step 1:            Balance the nucleon numbers (the top number)

235 + 1 = 95 + 139 + x(1) + 7(0)

Step 2:            Rearrange to find the value of x

x = 235 + 1 − 95 − 139 = 2

 

 

 

 

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