Chemical Symbol Zn. Element No. 30 of the
periodic system; atomic weight 65.38. Blue-white metal; when pure, malleable and
ductile even at ordinary temperatures; melting point 787 (degrees) F.; boiling
point 1665 (degrees) F., specific gravity 7.14. Can be electrodeposited; it is
extensively used as a coating for steel and sheet zinc finds many outlets, such
as dry batteries, etc. Zinc-base alloys are of great importance in die casting.
Its most important alloy is brass.
(Chemical Symbol Zr.) - Element No. 40 of the periodic system. Atomic weight 91.22. Specific gravity 6.5 and melting point at about 3200° +/- 1300°F. Because of its great affinity for oxygen and combines readily with nitrogen and sulfur, it is used as a deoxidizer and scavenger in steel making. It is used as an alloy with nickel for cutting tools and is used in copper alloys.