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The Element Gallium

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Definition of the Gallium Element
A rare metallic element that is liquid near room temperature, expands on solidifying, and is found as a trace element in coal, bauxite, and other minerals. Gallium is solid at normal room temperatures is soft enough to be cut with a knife.

Along with Mercury, cesium, and rubidium it becomes liquid when heated slightly. It is used in semiconductor technology and as a component of various low-melting alloys. 

It is stable in air and water; but it reacts with and dissolves in acids and alkalis. The Atomic Number of this element is 31 and the Element Symbol is Ga.

The Properties of the Gallium Element
Symbol of Element : Ga
Atomic Number : 31
Atomic Mass: 69.723 amu
Melting Point: 29.78 C - 302.93 K
Boiling Point: 2403.0 C - 2676.15 K
Number of Protons/Electrons : 31
Number of Neutrons : 39
Crystal Structure: Orthorhombic
Density @ 293 K: 5.907 g/cm3
Color : white / silver

Origin / Meaning of the name Gallium
The name originates from the Latin word Gallia meaning France also gallus, meaning "rooster"after the French chemist Paul-Emile Lecoq de Boisbaudan known as 'Lecoq'.

Periodic Table Group and Classification of the of the Gallium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Gallium classified in the 'Other Metals' section which can be located in groups 13, 14, and 15 of the Periodic Table. All of these elements are solid, have a relatively high density and are opaque. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

Facts about the Discovery and History of the Gallium Element
Gallium was discovered by Paul Emile Lecoq de Boisbaudran in France in 1875.

Occurrence of the Gallium Element
Gallium does not exist in pure form in nature
Found as a trace element in coal, bauxite, and other minerals

Abundances of the element in different environments
% in Universe 110-6%
% in Sun 410-6%
% in Meteorites 0.00076%
% in Earth's Crust 0.0019%
% in Oceans 310-9%
% in Humans N/A

Associated Uses of Gallium
Semi-conductors
Component of various low-melting alloys

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