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4 hours ago · Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements. It has six naturally occurring isotopes. It is one of the rarer elements in Earth's crust, with an average abundance of approximately 5 μg /kg. It occurs in some nickel and copper ores along with some native deposits, mostly in South Africa ...
- Platinum Group
The platinum-group metals (PGMs), also known as the...
- Reactivity Series
In chemistry, a reactivity series (or reactivity series of...
- Platinum (Disambiguation)
Places. Platinum, Alaska, a city; The Platinum, a condo...
- Platinum Group
2 days ago · Topological definition. A Lie group can be defined as a ( Hausdorff) topological group that, near the identity element, looks like a transformation group, with no reference to differentiable manifolds. [14] First, we define an immersely linear Lie group to be a subgroup G of the general linear group such that.
5 days ago · Nickel, chemical element, ferromagnetic metal of Group 10 (VIIIb) of the periodic table, markedly resistant to oxidation and corrosion. Silvery white, tough, and harder than iron, nickel is widely familiar because of its use in coinage but is more important as the pure metal or in the form of alloys.
- The Editors of Encyclopaedia Britannica
3 days ago · On the periodic table of the elements it is a p-block element, a member of group 18 and the last member of period 7. Its only known isotope, oganesson-294, is highly radioactive, with a half-life of 0.7 ms and, as of 2020, only five atoms have been successfully produced. This has so far prevented any experimental studies of its chemistry.
Another common method of categorization recognizes nine element families: Alkali Metals: Group 1 (IA) - one valence electron. Alkaline Earth Metals: Group 2 (IIA) - two valence electrons. Transition Metals: Groups 3-12 - two valence electrons. Boron Group or Earth Metals: Group 13 (IIIA) - three valence electrons.
3 days ago · Beryllium is a chemical element; it has symbol Be and atomic number 4. It is a steel-gray, strong, lightweight and brittle alkaline earth metal. It is a divalent element that occurs naturally only in combination with other elements to form minerals. Gemstones high in beryllium include beryl ( aquamarine, emerald, red beryl) and chrysoberyl.
2 days ago · Group (mathematics) The manipulations of the Rubik's Cube form the Rubik's Cube group. In mathematics, a group is a set with an operation that satisfies the following constraints: the operation is associative and has an identity element, and every element of the set has an inverse element. Many mathematical structures are groups endowed with ...
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