What is the Lewis dot diagram for #H_2O#?

1 Answer
May 30, 2017

Answer:

Well we have 6 valence electrons from the oxygen atom......

Explanation:

And 2 valence electrons from the hydrogen atom. And thus we have to distribute 4 electron pairs around the central oxygen atom. VESPER predicts that these 4 electron pairs will assume the shape of a tetrahedron:

boundless.com

The #"electronic geometry"# is tetrahedral to a first approximation. The #"molecular geometry"# is bent with #/_H-O-H~=104.5^@#; the (non-bonding) lone pairs are closer to the oxygen atom, and these tend to compress #/_H-O-H# down from the ideal tetrahedral angle of #109.5^@#.