if the symbol x represents a central atom, y represents outer atoms, and z represents lone pairs on the central atom, the structure the central x atom is single bonded to two y atoms, which are 180 degrees apart. the x atom has two lone pairs. could be abbreviated as xy2z2. classify each molecule according to its shape.

what should students do prior to taking the act science test? o a. determine whether they need to skip the optional act science test prior to registering for a test date o b. take first-year college courses related to science o c. enroll in dual enrollment courses to have a college-level understanding of science o d. take high school courses in earth science, physical science, and biology submit