Which statement best describes how the Great Rift Valley in Africa formed? A) The rift valley formed when the crust pulled apart. B) The rift valley formed due to subduction. C) The rift valley formed similarly to an island arc. D) The rift valley formed at a convergent boundary.

Hydrogen has only one electron in its only (and outer) electron shell. if a hydrogen atom were to absorb a small amount of energy, where would bohr say the electron would go? a. fly off the atom b. nowhere, it would just speed up. c. spiral inwards towards the nucleus d. move up to another shell that would form