The reactivity of hydroxide (OH - ), methanal (HCHO) and fluoride (F - ) can be best described by examining their structures.

The reactivity of hydroxide (OH-), methanal (HCHO) and fluoride (F-) can be best described by examining their structures. Draw the electron dot structures AND the Lewis structures of hydroxide, methanal and fluoride making sure to account for all charges.

Note: in methanal the carbon atom is directly connected to all the other atoms.