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1 day 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
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.
5 days ago · 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. Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and halite (NaCl).
2 days ago · The Cure are an English goth band formed in 1978 in Crawley, West Sussex. [1] [2] [3] Throughout numerous lineup changes since the band's formation, guitarist, lead vocalist, and songwriter Robert Smith has remained the only constant member, though bassist Simon Gallup has been present for all but about three years of the band's history.
1 day ago · List of space groups. There are 230 space groups in three dimensions, given by a number index, and a full name in Hermann–Mauguin notation, and a short name (international short symbol). The long names are given with spaces for readability. The groups each have a point group of the unit cell.
5 days ago · Arsenic is the 53rd most abundant element in the Earth's crust, comprising about 1.5 parts per million (0.00015%). [43] Typical background concentrations of arsenic do not exceed 3 ng/m 3 in the atmosphere; 100 mg/kg in soil; 400 μg/kg in vegetation; 10 μg/L in freshwater and 1.5 μg/L in seawater. [44]
3 days ago · Neptunium is a hard, silvery, ductile, radioactive actinide metal. In the periodic table, it is located to the right of the actinide uranium, to the left of the actinide plutonium and below the lanthanide promethium. [7] Neptunium is a hard metal, having a bulk modulus of 118 GPa, comparable to that of manganese. [8]
