So they come up with a better definition, a definition that includes many more bases and many more acids. And this concept is called the Broccolari acid based concept. So Broccollory bases are those molecules that can accept a Hydride ion using a lone pair of electrons. So let's look at the reaction of Ammonia and water. So in ammonia, we have an extra pair of electrons. And in fact, this pair of electrons will take away an H ion from the water molecule and this will produce Ammonium and hydroxide.