Noble Gas

• noble gas

  Any of the chemically inert gaseous elements of the helium group in the periodic tabl...

• argon

  A colorless and odorless inert gas; one of the six inert gases; comprises approximately 1%...

• helium

  A very light colorless element that is one of the six inert gasses; the most difficult gas...

• krypton

  A colorless element that is one of the six inert gasses; occurs in trace amounts in air.

• neon

  A colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six...

• radon

  A radioactive gaseous element formed by the disintegration of radium; the heaviest of the...

• xenon

  A colorless odorless inert gaseous element occurring in the earth's atmosphere in trace a...

Gas

• N

  A common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas;...

• chlorine

  A common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating...

• H

  A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic...

• O

  A nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic...

• F

  A nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable...

Halogen

• iodine

  A nonmetallic element belonging to the halogens; used especially in medicine and photography...

• astatine

  A highly unstable radioactive element (the heaviest of the halogen series); a decay product...

• bromine

  A nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens;...

Semiconductor

• germanium

  A brittle grey crystalline element that is a semiconducting metalloid (resembling silicon)...

• silicon

  A tetravalent nonmetallic element; next to oxygen it is the most abundant element in the...

Also contains

• metal

  Any of several chemical elements that are usually shiny solids that conduct heat or electricity...

• carbon

  An abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous...

• atom

  (physics and chemistry) the smallest component of an element having the chemical properties...

• S

  An abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals...

• plutonium

  A solid silvery grey radioactive transuranic element whose atoms can be split when bombarded...

• B

  A trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow...

• tellurium

  A brittle silver-white metalloid element that is related to selenium and sulfur; it is...

• selenium

  A toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic...

• hassium

  A radioactive transuranic element.

• arsenic

  A very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds...

• lawrencium

  A radioactive transuranic element synthesized from californium.

• mendelevium

  A radioactive transuranic element synthesized by bombarding einsteinium with alpha particles...

• meitnerium

  A radioactive transuranic element.

• nobelium

  A radioactive transuranic element synthesized by bombarding curium with carbon ions; 7...

• P

  A multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate...

• trace element

  An element that occurs at very small quantities in the body but is nonetheless important...

• roentgenium

  A radioactive transuranic element.

• rutherfordium

  A radioactive transuranic element which has been synthesized.

• allotrope

  A structurally different form of an element; "graphite and diamond are allotropes of ...

• seaborgium

  A transuranic element.

• transuranic element

  Any element having an atomic number greater than 92 (which is the atomic number...

• nonmetal

  A chemical element lacking typical metallic properties.

• transactinide

  Any of the artificially produced elements with atomic numbers greater than 103.

• actinium

  A radioactive element of the actinide series; found in uranium ores.

• ununhexium

  A radioactive transuranic element.

• ununbium

  A radioactive transuranic element.

• ununquadium

  A radioactive transuranic element.

• ununpentium

  A radioactive transuranic element.

• ununtrium

  A radioactive transuranic element.

• bohrium

  A transuranic element.

• dubnium

  A transuranic element.

• darmstadtium

  A radioactive transuranic element.