The periodic table and a natural number for each element[ edit ] Russian chemist Dmitri Mendeleevcreator of the periodic table.
Chemistry in its element: End promo Chris Smith Hello! Who gets to mention, as we unlock the story of a slimy element, that makes people stink of garlic and turns their fingers black. With the tale of tellurium, here's Peter Wothers.
Peter Wothers Tellurium, it sounds like a Dr. Who monster Atomic number and tellurium in a number of ways this element does have a few properties that would make it suitable for any good outer space, sci-fi horror movie. For a start, like many space monsters, it comes from slime; to be precise it is extracted from anode slime, a waste product formed during the electrolytic refining of copper.
Its special power, well in the form of cadmium telluride, it can capture solar energy. Far from being used for evil though, this compound has been used in some of the most efficient solar cells for the generation of electrical power. Every good monster must have a secret weapon and tellurium is no exception.
It gives its enemies garlic breath, really bad garlic breath. A dose of half a microgram, hardly even visible would give you garlic breath for 30 hours, Oh! And it also gives its victim black patches on the webbing in between the fingers, but few people would get close enough to notice this.
Like a certain well-known vampire, tellurium was first discovered in Transylvania. This was in by Franz Joseph Muller von Reichenstein, the chief inspector of the mines there. He was having particular problems with the analysis of an unusual gold containing ore.
Eventually, he managed to isolate a new metal from the ore and he called it aurum problematicum.
He sent a sample to the German chemist Martin Klaproth, who confirmed it was a new element and gave it the name tellurium. But to properly understand why he called it this, we need to go way back in time and look into space. When early man looked up at the stars at night, he noticed certain heavenly bodies that moved through the fixed pattern of the stars.
Two other great bodies also seemed to circle the earth, namely the Sun and the Moon. Altogether then there were seven such heavenly bodies and seven was a magical number.
Early man also knew of just seven metals, gold, silver, copper, iron, tin, lead and mercury; surely this could be no coincidence. In the same ways that rays from the sun nourish plants and are essential for their growth, it was thought that the invisible rays from the planets helped nourish metallic ores in the ground.
Each planet was thought to have a particular influence on one metal or its ores. Chaucer described this connection in the 14th Century.
The Sun is associated with gold, the Moon with silver, Mars with iron, Saturn with lead, Jupiter with tin and Venus with copper and even today, we still keep the same name for both the planet and the element, Mercury.
The association between gold and the Sun seems fairly obvious from their colours, similarly the connection between silver and the Moon. The other connections are little more vague. A 17th Century text quotes, "Iron is called by the name of Mars whether employed for the making of weapons of war, of which Mars was said to be the God or because of the influences from which iron receives from this planet.
The chemists called copper, Venus both by reason of the influences, which possibly it receives from that planet and of the virtue it had in diseases seated in the purpose of generation. This is referring to early treatments of venereal diseases, the diseases of Venus.
Being the planet closest to the Sun, Mercury moves through space faster than any other. It takes Mercury just 88 days to orbit the Sun, compared to our days. Perhaps, this speedy motion was one of the reasons for the lasting association between the metal and the planet or perhaps it is as described in one book "due to the fact that the element has an aptness to change its figure, a property attributed by the heathens to mercury, one of their false Gods.
Unfortunately, the magic number of 7 metals didn't last.
For a while, early chemists, just conveniently passed over antimony, arsenic, bismuth, zinc and cobalt. After all they weren't real metals, but with the discovery of platinum, they could ignore it no more. For a while, platinum was even known as the eighth metal.Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure.
The chemical symbol for Tellurium is Te. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium dioxide (TeO 2) Telluric acid (Te(OH) 6) Interesting facts: It is a relatively rare element as the rarest stable solid element in the earth's crust.
It is mildly toxic. When exposed to as little as milligrams per cubic meter of tellurium, humans develop tellurium breath, which has a garlic order. Tellurium has an atomic weight of , a density of and an atomic radius of pm. Its symbol is Te, and its atomic weight is It can be found in .
Atomic Number of Tellurium Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. The chemical symbol for Tellurium is Te.
Facts Date of Discovery: Discoverer: Franz Muller von Reichenstein Name Origin: From the Greek word tellus (Earth) Uses: coloring of glass and ceramics, thermoelectric devices Obtained From: by-product of refining of lead and copper Related Links I currently do not know of any links for Tellurium.
If you do, please let me know MLA Format for Citing This Page. Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus.
The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion (Z > 1).