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About 50% of tungsten is used in tungsten carbide, with the remaining major use being alloys and steels: less than 10% is used other compounds. [23] Tungsten is the only metal in the third transition series that is known to occur in biomolecules, being found in a few species of bacteria and archaea.
Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...
Tungsten was used in hammer throw balls at least up to 1980; the minimum size of the ball was increased in 1981 to eliminate the need for what was, at that time, an expensive metal (triple the cost of other hammers) not generally available in all countries. [182] Tungsten hammers were so dense that they penetrated too deeply into the turf. [183]
Nanopasta is an almost unfathomably thin strand of tungsten disulfide, with each measuring in at just 370 nanometers wide, which equates to about two hundredths the width of a human hair.
Oxygen, hydrogen, carbon and nitrogen are the most abundant elements in the body by weight and make up about 96% of the weight of a human body. Calcium makes up 920 to 1200 grams of adult body weight, with 99% of it contained in bones and teeth. This is about 1.5% of body weight. [2]
Because of its lower density and more stable price, molybdenum is sometimes used in place of tungsten. [52] An example is the 'M' series of high-speed steels such as M2, M4 and M42 as substitution for the 'T' steel series, which contain tungsten. Molybdenum can also be used as a flame-resistant coating for other metals.
Scientists explored Beethoven’s ailments, linked remains to a Norse saga, uncovered colonial secrets, peeked inside an alchemy lab and debunked a royal hoax in 2024.
An average 70 kg human body is about 0.01% heavy metals (~7 g, equivalent to the weight of two dried peas, with iron at 4 g, zinc at 2.5 g, and lead at 0.12 g comprising the three main constituents), 2% light metals (~1.4 kg, the weight of a bottle of wine) and nearly 98% nonmetals (mostly water). [51] [n 8]