Nickel
Nickel is a chemical element with the symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile. Pure nickel, powdered to maximize the reactive surface area, shows a significant chemical activity, but larger pieces are slow to react with air under standard conditions because an oxide layer forms on the surface and prevents further corrosion (passivation). Even so, pure native nickel is found in Earth's crust only in tiny amounts, usually in ultramafic rocks, and in the interiors of larger nickel–iron meteorites …
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Laws.Africa · 30 September 2022 English
(VI), cobalt, copper, lead, manganese, mercury, nickel, selenium, strontium, tin, organic tin and zinc …
Laws.Africa · 5 August 2022 English
Copper powders and flakes 74.06 Nickel waste and scrap 7503.00 Nickel Powders and flakes 75.04 Unwrought …
Laws.Africa · 29 July 2022 English
as Cr]; (bb) Copper [expressed as Cu]; (cc) Nickel [expressed as Ni]; (dd) Zinc [expressed as Zn]; …
Laws.Africa · 22 July 2022 English
development, mining and beneficiation of platinum, nickel and other minerals in Selous. The two parties formed …
Laws.Africa · 15 July 2022 English
Lead mg/l 0.2 0.01 Mercury µg/l 1.6 0.08 Nickel mg/l 0.5 0.025 Nitrate as Nitrogen mg/l 20 …
Laws.Africa · 22 June 2022 Arabic
75 % Nickel 25 % Couronne : Cuivre 92 % Aluminium 6 % Nickel 2 % …
Laws.Africa · 17 May 2022 Arabic
contenir moins de 17 % de chrome et moins de 7 % de nickel. La fonte à graphite sphéroïdal doit contenir …
Laws.Africa · 13 May 2022 English
prospect for platinum group metals, gold, copper and nickel within the area which has been reserved against … prospect for platinum group metals, gold, copper and nickel within the area which has been reserved against … prospect for platinum group metals, gold, copper and nickel within the area which has been reserved against … tantalum, caesium, rubidium, berylium, copper, zinc, nickel and silver within the area which has been reserved …
Laws.Africa · 14 April 2022 English
that contribute to these markets, such as copper, nickel, lithium, rare earth metals, graphite, and cobalt … MINERALS CURRENT / FUTURE NEEDS Cobalt Nickel Copper Zinc Lead Rare Earth Minerals Minerals … mineral development for minerals such as copper, nickel, chrome, cobalt, and lithium. Figure 4: Outlook …
Laws.Africa · 25 March 2022 English
intends to prospect for Platinum Group Metals, nickel and copper within the area which has been reserved …
