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In the Lewis dot structure for water, how many shared pairs of electrons are there?Group of answer choices4062

Question

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Solution

In the Lewis dot structure for water (H2O), there are 2 shared pairs of electrons. Here's how you can figure it out:

  1. Identify the total number of valence electrons. Oxygen has 6 valence electrons and each hydrogen atom has 1 valence electron. So, the total number of valence electrons is 6 + 1*2 = 8.

  2. Draw the Lewis structure. Oxygen is the central atom and hydrogen atoms are surrounding it.

  3. Distribute the electrons. First, place a pair of electrons between each hydrogen and oxygen to form a chemical bond. This uses 4 electrons, leaving 4 more.

  4. Place the remaining electrons on the oxygen atom. This uses up the remaining 4 electrons.

  5. Count the shared pairs. Each bond represents a shared pair of electrons, so there are 2 shared pairs in the water molecule.

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