List the following elements in order from smallest to largest atomic radius. Nitrogen, Lithium, Neon, Oxygen

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d.the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.