Is a solution with a pH less than 7 acidic, alkaline or neutral?

Aforce of attraction/repulsion due to the spin of electrons what is this force?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond