why bf3 is negative and nh4 is positive?
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Answer:Hey friend here is your answer,
Using this method u can solve for all molecules . if u have any doubts ask me in the comments.
Method 2 :
1) NH4 +
no:of valence electrons of central atom (N) = 5
no:of atoms attached to central atom = 4
charge on the molecule =+1
hybridisation=1/2(5+4-(+1))=8/2=4
So its sp3.
2)BF4 -
no:of valence electrons of central atom (B) = 3
no:of atoms attached to central atom = 4
charge on the molecule = - 1
hybridisation=1/2(3+4-(-1)=8/2=4
So its sp3.
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