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NEED FREE ONLINE DOUBT REMOVAL

Grade:11

2 Answers

Badiuddin askIITians.ismu Expert
148 Points
14 years ago

Dear vardaan

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varun singh
18 Points
10 years ago
Respected sir/madam,Ihave just passed 10 and is now in class 11.I have taken PCM in choice of subjects .i have the doubts in chemistry which are as follows:a)firstly ,please tell me the way to take out all valencies of any element.b)secondly,also tell why does diagonal relationship exists only between first 3 elements of second and third group.why cant it exist between (Na and Ca ,Mg and Ga ,C and P or N and S).

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