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 is a highly reactive soft greyish metal in its pure form, which is never found in nature because of said reactivity. Anyhow, to task: sodium has eleven (11) electrons, in a 2-8â1 configuration, with that one lonely valence electron in the outermost orbital/shell, accounting for the high degree of reactivity. In the nucleus are eleven (11) protons and twelve (12) neutrons. The only stable isotope of sodium is 24Na, which can only be formed thru nucleosynthesis at temperatures approaching 600 megakelvins.