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Gadolinium Symbol:"Gd" Atomic Number:"64" Atomic Mass: 157.25amu. Gadolinium is one of the elements in the lanthanide series of inner transition elements. It may classified as a rare earth element. This silvery metal is used in many alloys. One of its best uses is in nuclear reactors because it can stop neutrons and contain radioactivity of dangerous reactions.

More Information: Lanthanide Series
Gallium Symbol:"Ga" Atomic Number:"31" Atomic Mass: 69.72amu. It is classified as a basic metal. Gallium is a very brittle, silvery metal. You will find it in electronics, alloys, and thermometers.

More Information: Gallium
Gas Gases are groups of atoms that are spread over a large space. One of their physical characteristics is that they fill containers evenly and completely. The atmosphere is made up of gases.

More Information: Gases
Germanium Symbol:"Ge" Atomic Number:"32" Atomic Mass: 72.59amu. Germanium is classified as a semi-metallic element. Germanium is a grayish crystalline metal that is very brittle. You will find it in glass lenses, fluorescent lights, electronics, and many alloys.

More Information: Germanium
Glycerol Glycerol is a biological compound that has three carbons with three alcohol functional groups. It is the backbone molecule of many fats when combined with fatty acids.

More Information: Lipids
Gold Symbol:"Au" Atomic Number:"79" Atomic Mass: 196.97amu. Gold is one of the transition elements. Gold is one of the Earth's precious metals. You will find the yellow colored metal used in jewelry, electronics, coins, satellites, and even medicines. Gold is very non-reactive and will not oxidize in air.

More Information: Transition Metals
Gram A gram is metric unit of measure for mass. It is the weight of one milliliter of water at a temperature of 39.2 degrees Fahrenheit.

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Gram-mole This is a specific measure of mass. The mass of a substance when there is one mole of the substance. For sodium chloride, the formula mass is 58.44. One gram-mole of sodium chloride is 58.44 grams.

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Gravitation A process used to separate compounds that have different densities. When river water is thoroughly mixed, sand will settle on the bottom of a glass before the silt. Sand settles first because it has a greater density.

More Information: Mixtures
Group On the periodic table, the columns are called groups. Elements are arranged in groups by the number of electrons that are in the outside shell. The elements of each group have the same number of electrons in their outer shells.

More Information: Periodic Table


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Chem4Kids: Matter
Chem4Kids: Atoms
Chem4Kids: Elements
Chem4Kids: Periodic Table
Chem4Kids: Reactions
Chem4Kids: Biochemistry

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