Share. By Anne Marie Helmenstine, Ph.D. Definition: Valence bond theory is a chemical bonding theory that explains the bonding between two atoms is caused by the overlap of half-filled atomic orbitals. The two atoms share each other's unpaired electron to form a filled orbital to form a hybrid orbital and bond together.
The Second Continental Congress was a convention of delegates from the Thirteen Colonies that started meeting in the summer of 1775, in Philadelphia, Pennsylvania, soon after warfare in the American Revolutionary War had begun.
Second Great Awakening. The Second Great Awakening was a Protestant religious revival during the early 19th century in the United States. The movement began around 1790, gained momentum by 1800 and, after 1820, membership rose rapidly among Baptist and Methodist congregations whose preachers led the movement. It was past its peak by the late 1850s. The Second Great Awakening reflected Romanticism characterized by enthusiasm, emotion, and an appeal to the super-natural. It rejected the skeptical rationalism and deism of