A silvery-white metal that is a constituent of brass and is used for coating iron and steel to protect against corrosion.

A chemical element of the noble gas group found especially in natural gases and used chiefly for inflating airships and balloons, as a coolant for superconductors, and as a component of inert atmospheres.

A trivalent metalloid element found in nature only in combination and used especially in glass and detergents.

A metallic element that is used in alloys, pharmaceuticals, and in pigments for cosmetics.

A chemical element of the alkali metal group that is the lightest metal known and that is used especially in alloys and glass, in mechanical lubricants, and in storage batteries.

A hard white metal used in stainless steel and other alloys.

A colorless odorless mostly inert gaseous element that is found in minute amounts in air and is used in electric lamps.

A tetravalent nonmetallic element that occurs combined as the most abundant element next to oxygen in the earth's crust and is used especially in ferrosilicon for steelmaking, in other alloys, and in semiconductors.

A soft faintly bluish-white lustrous low-melting crystalline metallic element that is malleable and ductile at ordinary temperatures and that is used especially in containers, as a protective coating, in tinfoil, and in soft solders and alloys.

A silver-white soft light low-melting monovalent metallic element of the alkali metal group that occurs abundantly in nature especially combined in minerals.

A radioactive metallic element obtained especially from nuclear fuel as a product of uranium fission and used as a diagnostic radiopharmaceutical.

A colorless odorless inert gaseous element found in the air and in volcanic gases and used especially in welding, lasers, and electric bulbs

A grayish-white hard brittle metalloid element that resembles silicon and is used especially in optical and semiconductor materials and as a catalyst.

A soft poisonous metallic element that resembles lead in physical properties, occurs sparsely in a number of common ores, and is used chiefly in the form of compounds especially in photosensitive devices and formerly as a pesticide.

A short-lived radioactive element of the alkali-metal group occurring naturally as a disintegration product of actinium and also produced artificially.

A grayish-white usually hard and brittle metallic element that resembles iron but is not magnetic and is used especially in alloys, batteries, and plant fertilizers.

A colorless relatively inert gaseous element found in air in trace amounts and used especially in electric lamps

A radioactive halogen element discovered by bombarding bismuth with alpha particles and also formed by radioactive decay.

A radioactive metallic element that has similar chemical properties to tellurium and bismuth, is produced mainly from the radioactive decay of neutron-irradiated bismuth, and emits an alpha particle to form an isotope of lead.

A silver-white soft waxy ductile element of the alkali metal group that occurs abundantly in nature in combined form and is very active chemically.

A metallic element that resembles chromium and tungsten in many properties, is used especially in strengthening and hardening steel, and is a trace element in plant and animal metabolism.

A heavy radioactive gaseous element formed by the decay of radium

A semimetallic element that occurs in a silvery-white brittle crystalline form of metallic luster, in a dark amorphous form, or combined with metals and that is used especially in alloys and catalysts.

A very unstable element made by high-energy atomic collisions.

A soft silvery metallic element of the alkali metal group that reacts violently with water and bursts into flame spontaneously in air.