Gallium example sentences

Aluminium and gallium oxides are amphoteric and those of indium and thallium are basic in their properties.Mendeleev predicted not only the existence of gallium and germanium, but also described some of their general physical properties.It is worthwhile to note that gallium with unusually low melting point (303K), could exist in liquid state during summer.The presence of additional 10 d-electrons offer only poor screening effect (Unit 2) for the outer electrons from the increased nuclear charge in gallium.The outer electronic configureuration of these elements is ns2np A close look at the electronic configureuration suggests that while boron and aluminium have noble gas core, gallium and indium have noble gas plus 10 d-electrons, and thallium has noble gas plus 14 f- electrons plus 10 d-electrons cores.Boron is a typical non-metal, aluminium is a metal but shows many chemical similarities to boron, and gallium, indium and thallium are almost exclusively metallic in character.For example, both gallium and germanium were unknown at the time Mendeleev published his Periodic Table.Consequently, the atomic radius of gallium (135 pm) is less than that of aluminium (143 pm).Gallium, indium and thallium are less abundant elements in nature.