What do we call the bond that forms when atoms share two pairs of electrons (I have a test tomorrow and I'm doing a review right now but have no idea what the answer to this is.)

A covalent bond (also called a molecular bond)

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.