Which molecule has an equal number of bonding electrons and lone-pair electrons?

To determine which molecule has an equal number of bonding electrons and lone-pair electrons, we need to consider the Lewis structure of each molecule.

1. Start by drawing the Lewis structure of each molecule. This involves determining the central atom and placing the surrounding atoms around it, connecting them with single bonds.

2. Count the number of valence electrons for each atom in the molecule. This can be found by referring to the periodic table.

3. Distribute the valence electrons around the atoms, making sure to follow the octet rule (except for hydrogen, which only needs 2 electrons).

4. Subtract the number of electrons used in bonding from the total number of valence electrons to determine the number of lone-pair electrons.

5. Compare the number of bonding electrons and lone-pair electrons for each molecule. If they are equal, then that molecule has an equal number of bonding and lone-pair electrons.

By following these steps, you will be able to identify the molecule with an equal number of bonding and lone-pair electrons.