Gold is a chemical element with the symbol Au (from Latin: aurum) and atomic number 79, making it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental (native) form, as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides).
Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is insoluble in nitric acid, which dissolves silver and base metals, a property long used to refine gold and confirm the presence of gold in metallic substances, giving rise to the term acid test. Gold also dissolves in alkaline solutions of cyanide, which are used in mining and electroplating. Gold dissolves in mercury, forming amalgam alloys, and as the gold acts simply as a solute, this is not a chemical reaction.
A relatively rare element, gold is a precious metal that has been used for coinage, jewelry, and other arts throughout recorded history. In the past, a gold standard was often implemented as a monetary policy. Still, gold coins ceased to be minted as a circulating currency in the 1930s, and the world gold standard was abandoned for a fiat currency system after 1971.
As of 2017, the world's largest gold producer by far was China, with 440 tonnes per year. A total of around 201,296 tonnes of gold exists above ground, as of 2020. This is equal to a cube with each side measuring roughly 21.7 meters (71 ft). The world consumption of new gold produced is about 50% in jewelry, 40% in investments and 10% in industry. Gold's high malleability, ductility, resistance to corrosion and most other chemical reactions, and conductivity of electricity have led to its continued use in corrosion-resistant electrical connectors in all types of computerized devices (its chief industrial use). Gold is also used in infrared shielding, colored-glass production, gold leafing, and tooth restoration. Certain gold salts are still used as anti-inflammatories in medicine.
🔰𝐍𝐄𝐗𝐓 𝐔𝐏🔰
🏆 #NBCPremierLeague
⚽️ Young Africans SC 🆚 Geita Gold FC
📆 14.03.2024
🏟 Azam Complex
🕖 02:15 Usiku
Kikosi kinachoanza dhidi ya Geita Gold FC
#TimuYaWananchi
#DaimaMbeleNyumaMwiko
Mpira umeanza
Dakika ya 5
Aziz k anachezewa madhambi nje ya 18
Dakika ya 7
Yanga SC wanapata kona...
Kwa hakika CHADEMA imekamilika. Kwa maana makamanda wake takribani wote, ni moto 💥🔥💥!
Akihojiwa live leo na kituo hicho maarufu 88.7 pande za huko, kamanda huyo hakumung'unya maneno.
"Kwamba:
1. Bila katiba mpya, kwa hali ya sasa rais anaweza kufanya lolote ikiwamo ndivyo sivyo bila...
Position: Facilities & Services Officer
Responsibilities:
Ensure compliance with the quality of meals provided from the messes and the services rendered by the contractor.
Ensuring always there is hygiene in the kitchen, mess facility and accommodation area.
Management of the accommodation...
Match Day....
#nguvumoja#
Kikosi Cha Simba Kinachoanza.
Kikosi cha Geita Kinachoanza.
Updates...
Mpira Unaendelea
06' Simba wanafanya mashambulizi yakushtukiza kwenye lango la Geita Gold
08' Simba wanapata faulo karibu kabisa na lango la Geita.
Inapigwa inakuwa goli kick
15' Simba...
Expression of Interest (EOI) for the Supply of Chemical and Reagents to Process Plant
REF: BGC/TZ/PLANT/MET/2023/01
Buckreef Gold Company Ltd “BGCL”), a JV agreement company between State Mining Corporation (STAMICO) and TRX Gold, a 100% owned subsidiary of Tanzanian Gold Corporation (TSX...
Hello bosses and roses...
Nauza Apple iPhone XS Max Gold kwa 500k tu. Nimeitumia kwa miezi miwili tu, battery health ni 87%.
Bado ni mpya kimwonekano hata kimatumizi.
UPDATE.
========
SOLD
Saturn Resources has capitalised on African gold miners trading at a discount.
Saturn Resources has agreed to buy Shanta Gold, a mining company registered in Guernsey with a focus on East African operations, for £141.95m ($180.7m).
Shanta’s shares were bought at a 6.7% premium above their...
Position: Payroll Accountant
Job Identification: 227410
Job Schedule: Full time
Location: Kahama Shinyanga, P.O. Box 891, TZ
Responsibilities:
Work in compliance with ISO 14001 and 45001 Standards
To complete payroll processing cycle
Timely and accurate data collection for monthly payroll...
Position: Coordinator 1 – Training (Dump Truck)
Contract type & Duration: Unspecified Time Contract
Department: Human Resources
Reporting to: Underground Mining Training Specialist
Number of Positions: One (1)
Purpose of the Role:
To develop the professional capabilities of Haul Truck and...
Position: Coordinator 1 – UG Mining Training
Contract type & Duration: Unspecified Time Contract
Department: Human Resources
Reporting to: Underground Mining – Training Specialist.
Number of Positions: One (1)
Qualifications:
Education “O” Level & Above and Training certification -ToT
A...
Position: Service Data Clerk
Job Identification: 227192
Schedule: Full time
Location: Kahama, Shinyanga
Responsibilities:
Ensure safe work practices, i.e., attending compulsory safety courses and meetings, use of required PPE, incident/accident reporting and ensuring total adherence to all...
Position: Underground Shaft Engineer
Job Identification: 226944
Location: Kahama, Shinyanga, P.O. Box 891, Tanzania
Position Description
Bulyanhulu Gold Mine is seeking to recruit an Underground Shaft Engineer to join and grow our team.
Join our exceptional team and embody Barrick's core...
Position: Civil Engineer
Job Identification: 226946
Job Category: Capital Projects
Job Schedule: Full time
Location: Kahama, Shinyanga, P.O. Box 891, Tanzania
Position Description
Bulyanhulu Gold Mine is seeking to recruit a Civil Engineer to join and grow our team.
Join our exceptional team...
Position: Coordinator 1 – Training – Technical
Contract type & Duration: Unspecified Time Contract.
Department: Human Resources
Reporting to: Senior Officer – Technical Training
Number of Positions: One (01)
PURPOSE OF THE ROLE:
This role exists to coordinate and facilitate training programmes...
Position: Specialist 1 – Intelligence
Location: Tanzania
Contract type & Duration: Unspecified time contract.
Department: Security
Reporting to: Superintendent 2 – Investigation and Intelligence.
Number of Positions: One (01)
PURPOSE OF THE ROLE:
The purpose of the Intelligence Specialist role...
Serikali kupitia kwa Mwanasheria Mkuu wa Serikali imethibitisha kuilipa kampuni ya Winshear Gold fidia ya Tsh. Bilioni 75 baada ya kukamilika kwa mazungumzo ya kumaliza Mggoro nje ya Mahakama.
Chanzo cha mgogoro huo ni uamuzi wa Serikali wa mwaka 2017 kuifutia kampuni hiyo leseni ya uendeshaji...
Hawa viongozi tuliowaamini wana mgao! Wao ndo wanapanga fidia kiasi gani! Unakuta mlalamikaji wala hana neno na alishindwa kwenye kesi ya msingi ya kwanza! Sasa wanamwendea na kumlazimisha aifufue hiyo kesi na atashinda kwa fidia (labda tuseme 1 billion).
Hawa watanzania mafisadi wanasema...
Nimeangali clip za magoli mawili ya Yanga yalioyofungwa na Pacome na lile la Azizi k nimegundua yametokana na udhaifu unaofanana lakini hii inaweza kuwa ndio mbinu ya Yanga ya kimchezo.
Ukiangalia, magoli yote mawili ni matokeo ya mpira wa kasi wa Yanga unaolzamisha timu pinzani kukimbiza upepo...
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