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Home > Group 3 element

A Group 3 element is an element in periodic table group 3 ( IUPAC style) in the periodic table, which consists of:

• scandium (21)

• yttrium (39)

• lanthanum (57) - lutetium (71)

• actinium (89) - lawrencium (103)

All of these elements are classed in Group 3 because their outer shell holds three electrons. Scandium, yttrium, and the lanthanides (except promethium) can all be found naturally, albeit at very low levels in the Earth's crustEarth also known as the Earth or Terra is the planet on which we live, the third planet outward from the Sun. It is the largest of the solar system's terrestrial planets, and the only planetary body that modern science confirms as harbouring life. The pla, and are collectively called rare-earthA rare earth is an oxide of a rare earth element. Often rare earth elements themselves are loosely called "rare earths". Rare earth elements, or metals, are the lanthanides and actinides. They come from the f-block. They are: lanthanum, cerium, praseodymi metals. PromethiumNeodymium Promethium Samarium Pm Np Full table General Name, Symbol, NumberPromethium, Pm, 61 Chemical series Lanthanides Group, Period, Block _, 6 , f Density, Hardness 7264 kg/m3, no data Appearance metallic Atomic properties Atomic weight 145 u Atomic (61) and neptuniumuranium neptunium plutonium Pm Np Full table General Name, Symbol, NumberNeptunium, Np, 93 Chemical series Actinides Period, Block 7 , f Density, Hardness 20250 kg/m3, n/a Appearance Silvery metallic Atomic properties Atomic weight 1 E-25 kg|[237] u]] Ato (93) through lawrencium can only be produced in the laboratory and have not been found in nature.

Color coding for these atomic numbers: At room temperature, all are solid; red indicates item is synthetic and does not occur naturally.

External link

http://www.iupac.org/reports/periodic_table/index.html

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Topics: Group 3 Element Table Metals Yttrium Series Lanthanides Coding...

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