ICSE Class 9 Chemistry Question 21 of 22

Atomic Structure — Question 21

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21
Question

Question 4(1994)

Copy and complete the following table relating to the atomic structure of some elements :

ElementAtomic No.Mass No.No. of ProtonsNo. of NeutronsNo. of Electrons
Beryllium49      
Fluorine9    10  
Sodium      1211
Aluminium  27    13
Phosphorus  3115    
Answer
ElementAtomic No.Mass No.No. of ProtonsNo. of NeutronsNo. of Electrons
Beryllium49454
Fluorine9199109
Sodium1123111211
Aluminium1327131413
Phosphorus1531151615