The two electrons will go into the bonding molecular orbital, forming our SP 30 hybridized molecular orbitals. So, though, now let's define what a broncidlaric acid and a broncillary base is. A bronzedidlori acid is a molecule that donates an H ion, while a broncillary base is a molecule that accepts an H ion. So acid strength of a broncillary acid increases with increasing S character. So why is that? Well, to examine that, let's recall one simple concept.