Answer the following

Dear student , 
(i)   Atomic no of X  =  no. of protons  =  17 and mass no. of X = no. of protons + no. of neutrons =  17 + 18 =  35 
(ii) Y is an cation as it has one electron less than the total no. of protons 
(iii) X and Z are isotopes to each other as they have same atomic no. or no. of protons 
Regards

 

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