In the context of chemistry and molecular science, what does the term "polar" describe?
A) Polar describes a substance that has an even distribution of electrical charge, resulting in no distinct poles.
B) Polar refers to molecules that have an uneven distribution of electrical charge, leading to distinct positive and negative poles.
C) Polar indicates substances that do not dissolve in water and are typically non-reactive.
D) Polar refers to elements that have a symmetrical arrangement of atoms and do not interact with electromagnetic fields.