Which solution turns litmus paper red

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

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit