In the molecule PCl3PCl3, phosphorus makes three covalent bonds. Therefore, three of its five valence electrons need to be unpaired. The orbitals with the same energy are known as degenerate orbitals. For example, the p subshell has three degenerate orbital, namely, pxpx, pypy, and pzpz. How many degenerate orbitals are needed to contain five electrons with three of them unpaired?

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Identify the electromagnets with poles that are reversed from the electromagnet shown above