El metal versátil: tungsteno y sus aplicaciones

Tungsten is a grayish-white metal with atomic number 74 and symbol W. It originates from the Swedish word 'tunestent' and was first isolated from wolframite ore. Tungsten's discovery involved Carl Wilhelley and the Elullar brothers. It was used in incandescent bulbs, which were inefficient and phased out. Tungsten forms heavy metal alloys like high-speed steel, used in cutting tools. Its high melting point makes it suitable for aerospace and automotive industries. Tungsten is also used in superalloys and as a gold substitute in jewelry due to its similar density and hypoallergenic properties.

What is the atomic number of tungsten?

• 72

• 73

• 74

• 75

Which mineral was used to first isolate tungsten?

• Chelite

• Wolframite

• Galena

• Bauxite

Why did tungsten filament bulbs become less popular?

• They were difficult to manufacture.

• They were inefficient at converting electricity to light.

• They were too expensive.

• They were too bright.

What percentage of tungsten is typically found in high-speed steel?

• 30%

• 20%

• 10%

• 40%

Why is tungsten used as a substitute for gold in jewelry?

• It is cheaper than gold.

• It has a similar density to gold.

• It is more abundant than gold.

• It is more colorful than gold.