Graphology - the study of handwritings; autograph - written with one's own hand; seismograph - a machine noting strength and duration of earthquakes. marina - a harbor for pleasure boats; maritime - relating to the sea; submarine - an undersea boat; aquamarine - color of sea water.
Chemicals are classified into various hazard classifications in accordance with their physiochemical properties and health hazards. Each class of chemical has a pictorial symbol called a danger symbol.
From Wikipedia, the free encyclopedia. Chemical composition refers to the arrangement, type and ratio of atoms in molecules of chemical substances. Chemical composition varies when chemicals are added or subtracted from a substance, when the ratio of substances changes, or when other chemical changes occur in chemicals.The chemical composition of a substance determines the properties of the substance.This means that the way atoms are put together in something determines the color, density, strength, and other properties of the thing. This short article about chemistry can be made longer. You can help Wikipedia by adding to it.he chemical composition of a substance determines the properties of the substance. This means that the way atoms are put together in something determines the color, density, strength, and other properties of the thing. This short article about chemistry can be made longer. You can help Wikipedia by adding to it.