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Solution


Q.

The number of protons, neutrons and electrons in Lu71175, respectively, are                 [2020]
 
1 71, 104 and 71  
2 104, 71 and 71  
3 71, 71 and 104  
4 175, 104 and 71  

Ans.

(1)

Lu71175, Number of protons = Number of electrons = Atomic number = 71

Number of neutrons = Mass number – Atomic number

                                 = 175 – 71 = 104