Final answer:
Polar elements find unity through fundamental properties of magnetism in the case of magnets and varying degrees of electronegativity in covalent bonds.
Step-by-step explanation:
When it comes to the unity of polar elements, we can look at examples such as magnets and covalent bonds. In the case of magnets, the north and south poles always occur in pairs. Attempts to separate them result in more pairs of poles. Even at the atomic level, an iron atom has a north pole and a south pole that cannot be separated. This unity exists because of fundamental properties of magnetism.
In the case of covalent bonds between different elements, there is a concept of electronegativity that measures how strongly atoms attract electrons. A higher electronegativity value means the atom attracts electrons more strongly. This scale helps determine the degree of polarity in a covalent bond. The unity of polar elements in covalent bonds exists because of the varying degrees of electronegativity between the atoms involved.