9. How many valence electrons are in the Lewis structure of NH3? A point D 15

## Step 1<br />The Lewis structure is a graphical representation of the valence electrons in an atom. It is used to show how the electrons are arranged around an atom and how they are shared between atoms in a molecule.<br /><br />## Step 2<br />In the case of ammonia (NH3), we need to consider the valence electrons of both nitrogen (N) and hydrogen (H).<br /><br />## Step 3<br />Nitrogen (N) has 5 valence electrons. This is because nitrogen is in group 15 of the periodic table, and the number of valence electrons is equal to the group number for main group elements.<br /><br />## Step 4<br />Hydrogen (H) has 1 valence electron. This is because hydrogen is in group 1 of the periodic table, and the number of valence electrons is equal to the group number for main group elements.<br /><br />## Step 5<br />To find the total number of valence electrons in the Lewis structure of NH3, we add the valence electrons of nitrogen and hydrogen.<br /><br />### \(5 (from N) + 3*1 (from 3H) = 8\)