What is a renewable source of energy? a. an energy resource that is used up over time. b. an energy resource that is available and can be recreated. c. an energy resource that is no longer used. d. an energy resource that is now used more than oil and gas.

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

What is the common name for the compound shown here? enter the common name of the compound shown?

If a 20.0ml test tube measures 15.0cm, what is the length in meters?