natural polymers, e.g. hardened proteins, chemical derivatives of natural rubber, n.e.s., in primary forms (excl. alginic acid and its salts and esters) ton cyprus united kingdom - - nucleic acids and their salts, whether or not chemically defined; heterocyclic compounds (excl. those with oxygen or...
arranged according to the periodic law discovered by dmitri i. mendeleev and revised by henry g. j. moseley. in the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled ..... click the link for more information. . calcium is chemically...