The International Journal of Digital Earth is an international peer-reviewed academic journal (SCI-E with a 2016 impact factor 2.292) focusing on the theories, technologies, applications, and societal implications of Digital Earth and those visionary concepts that will enable a modeled virtual world.
Search the Internet with Kids.Net.Au. Definition of sodium. a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
Sodium: the essentials. Sodium is a Group 1 element (or IA in older labelling styles). Group 1 elements are often referred to as the alkali metals. The chemistry of sodium is dominated by the +1 ion Na + .Sodium salts impart a characteristic orange/yellow colour to flames and orange street lighting is orange because of the presence of sodium in the lamp. Soap is generally a sodium salt of fatty acids.roup 1 elements are often referred to as the alkali metals. The chemistry of sodium is dominated by the +1 ion Na + . Sodium salts impart a characteristic orange/yellow colour to flames and orange street lighting is orange because of the presence of sodium in the lamp.