How many lone pairs of electron are there on the central atom of the H2O molecules?
1
2
3
4
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Discussions (17)
the answer is B , water molecule has 2 lone pairs of electron, the Central atom being oxygen which belongs to the group 6 of the periodic table while hydrogen belong to the first group of the periodic table having a valence electron of 1 , using this information we can calculate the bond pair and lone pair present in the molecule
formula for calculating lone pair is
central atom-bond pair
remember oxygen is the central atom while hydrogen is the bond pair and the bond pair of water is 2
6-2=4
so therefore the lone pair present in water molecule is 2 because each oxygen molecule contributes 2 atoms for the reaction
please review this question my school
thank you 
Please but many past questions say 1 how do we do about it if it comes out in jamb??
@Myschool,,,, pls the answer should be 2 and not 1...
Make reference to New School Chemistry page 62, table 4.10, elecrons pairs in covalent molecules...
Teasebliss22
myschool, Did you still need more prooves before you correct the answer to the question 
Even though people have provided evidence to back their points yet my school refused to effect the change âšī¸
This hasn't been corrected. 2 is the answer, but the option provided is suggesting A.
The electron-dot structure of NH 3 places one pair of nonbonding electrons in the valence shell of the nitrogen atom. This means that there are three bonded atoms and one lone pair for a coordination number of four around the nitrogen, the same as occurs in H 2O.the answer is 1
