CAS Number: 106-99-0. A flammable, gaseous, open chain
hydrocarbon used in making synthetic rubbers. Chemical formula
= C4H6. Molecular weight = 54.092 g/mol.

CAS Number: 71-36-3. Either of two flammable four-carbon
alcohols derived from normal butane. Chemical formula = C4H9OH.
Molecular weight = 74.122 g/mol.

CAS Number: 7440-43-9. A bluish-white, malleable and toxic
metallic element used especially in protective platings and in
bearing metals. Chemical symbol = Cd. Molecular weight = 112.41
g/mol.

CAS Number: 7440-70-2. A silver-white bivalent metallic element
of the alkaline-earth group occurring only in combination.
Chemical symbol = Ca. Molecular weight = 40.078 g/mol.

CAS Number: 7439-89-6. A heavy, malleable, magnetic, silver-white
metallic element that readily rusts in moist air, occurs native
in meteorites and combined in most igneous rocks. It is the most
used of metals, and is vital to biological processes. Chemical
symbol = Fe. Molecular weight = 55.845 g/mol.

CAS Number: 7439-95-4. A lightweight, silver-white, malleable
metallic element that occurs abundantly in nature and is used
in metallurgical and chemical processes, in photography,
signaling, and pyrotechnics because of the intense white light
it produces on burning, and in construction especially in the
form of light alloys. Chemical symbol = Mg. Molecular weight =
24.305 g/mol.

CAS Number: 7723-14-0. A nonmetallic element of the nitrogen
family that occurs widely especially as phosphates. Chemical
symbol = P. Molecular weight = 30.973761 g/mol.

CAS Number: 7440-31-5. A soft, faintly bluish-white, lustrous, low-
melting, crystalline metallic element that is malleable and
ductile at ordinary temperatures and that is used as a
protective coating, in tinfoil, and in soft solders and alloys.
Chemical symbol = Sn. Molecular weight = 118.71 g/mol.

CAS Number: 7440-62-2. A grayish, malleable metallic element
found combined in minerals and used especially to form alloys (as
vanadium steel). Chemical symbol = V. Molecular weight = 50.9415
g/mol.

CAS Number: 7440-22-4. A white metallic element that is very
malleable, capable of a high degree of polish, and has the
highest thermal and electric conductivity of any substance.
Chemical symbol = Ag. Molecular weight = 107.8682 g/mol.