Draw the Lewis structure for H2O. How many lone pairs of electrons are there in the central atom?

2 lone pairs of electrons

Explanation:

In this case, the central atom is oxygen. If we check the periodic table we will have an atomic number of 8. So, the electronic configuration would be:

We have 6 electrons in the last level. Therefore, we have 6 valence electrons. For the hydrogens, we will have only 1 electron each. So, in total, we have 8 electrons.

With this in mind, we have to draw two lone pairs in the oxygen and 1 bond with each hydrogen.

See figure 1.

I hope it helps!

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