Question: The tungsten is a very important element from the technological point of view, which is used, among other things, in the steel industry. But his interest extends to other scientific fields, due to: 
 Options:  <1> Which is one of the essential elements for life are human beings and animals. <2> Which is liquid in the range 27ºC-2500ºC, which explains its use in high temperature thermometers. <3> Its inability to react with oxygen even at such high temperatures as heating to red. <4> Its total resistance to fluoride even at temperatures as high as heating to red. <5> Its great mechanical resistance.
5