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- Em química, um metal, do grego antigo métalon pode ser chamado de várias maneiras: pode ser um elemento, uma substância ou uma liga metálica caracterizado pela sua boa condutividade térmica e elétrica, geralmente apresentando uma cor prateada ou amarelada, e uma elevada dureza.
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Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23 Na. The free metal does not occur in nature and must be prepared from compounds.
- Natrium (Disambiguation)
Main page; Contents; Current events; Random article; About...
- Abundance of Elements in Earth's Crust
Abundance of chemical elements in Earth's (continental)...
- Isotopes of Sodium
There are 20 isotopes of sodium (11 Na), ranging from 17 Na...
- Flame Test
A flame test is relatively quick test for the presence of...
- Standard Atomic Weight
Example: copper in terrestrial sources. Two isotopes are...
- Natrium (Disambiguation)
A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride. In physics, a metal is generally regarded as any substance capable of conducting electricity at a temperature of absolute zero.
List of elements. Atomic. Number. Name. Symbol. Group. Period. Number. Block.
- Definition and Classification
- Electronic Configuration
- Characteristic Properties
- See Also
The 2011 IUPAC Principles of Chemical Nomenclature describe a "transition metal" as any element in groups 3 to 12 on the periodic table. This corresponds exactly to the d-block elements, and many scientists use this definition. In actual practice, the f-block lanthanide and actinide series are called "inner transition metals". The 2005 Red Book all...
The general electronic configuration of the d-block atoms is [noble gas](n − 1)d0–10ns0–2np0–1. Here "[noble gas]" is the electronic configuration of the last noble gas preceding the atom in question, and n is the highest principal quantum number of an occupied orbital in that atom. For example, Ti (Z = 22) is in period 4 so that n = 4, the first 1...
There are a number of properties shared by the transition elements that are not found in other elements, which results from the partially filled d shell. These include 1. the formation of compounds whose colour is due to d–d electronic transitions 2. the formation of compounds in many oxidation states, due to the relatively low energy gap between d...
Inner transition element, a name given to any member of the f-blockCrystal field theory a model that describes the breaking of degeneraciesof electronic orbital statesThe alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), [note 1] rubidium (Rb), caesium (Cs), [note 2] and francium (Fr). Together with hydrogen they constitute group 1, [note 3] which lies in the s-block of the periodic table.
Aluminium ( Aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air.
t. e. The chemical elements can be broadly divided into metals, metalloids, and nonmetals according to their shared physical and chemical properties. All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metals; and have at least one basic oxide.
