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.
A chemical compound is a PURE substance that has two or more different types of atoms in that have chemically bonded (e.g. Iron atoms, Oxygen atoms). The ratio of all atoms inâ¦ a particular compound (as shown in its molecular formula) is unique for that specific compound.