English for chemists 2 course, test-paper 2

Its salts form the hard part of bodies of most living creatures,useful in building

Silver -white soft metal,burns in air with white flame,obtained from sea, used in car and aircraft manufacture

It is shiny,soft,it has heavy density.used to set diagnosis of intestinal bodies

shiny,soft metal,red colour when heated,used in fireworks

Dark grey with metalic luster,second abundant element found in gemstones and minerals

soft,silvery-white,plated onto iron,forms against rusting protective surface

dense,malleable,gravisch metal,easy to refine and purify

brittle, alloys with it has a low melting point,used in paints, in cosmetics

blue-white metal,toxic,used in alloys with metals to make them harder, it is used in semiconductors

poisonous metaloid,has metalic grey form and non-metalic yellow

black solid,it is found in 3 forms, It is stable at room temperature

obtained by fractional distilation, clourless, has low boiling points, it is found in explosives