A change that does not involve changing any substances into any other substances is called a physical change. This is a characteristic that a substance can display without undergoing a change in its identity. Although their physical appearances of these three states are different, their chemical makeup in all three states are the same. The group of transition metals found in Group VIII of the Periodic Table. Their chemical and physical properties are similar, and they occur together in mineral deposits.
Polar bond See polar covalent bond .
Polar covalent bond Also known as polar bond . It is a type of covalent bond formed by the unequal sharing of electrons between atoms whose electronegativities differ. Dow Chemical Co. It is a hard non-transparent material which is made useful by the incorporation of plasticizers. It is chemically inert and does not corrode or rot. But it decomposes in summer sunlight due to the action of ultraviolet light.