history platinum describes

About us – Anglo American

In this section you can learn about our approach to mining, where we operate and our leaders. You can also find out about sponsorship opportunities at Anglo American and our governance structure.

Get Price

Kilogram: The Kibble Balance | NIST

NIST''s Kibble Balance. The principles of NIST-4 are depicted in the animation below. The watt balance lets researchers determine the mass of an object indirectly via two measuring modes that determine two different quatities: the strength of the magnetic field, and the current running through a coil of wire.

Get Price

It''s Elemental - The Element Tantalum

History and Uses: Tantalum was discovered by Anders Gustaf Ekenberg, a Swedish chemist, in 1802 in minerals obtained from Ytterby, Sweden. ... It has a high melting point and is frequently used as a substitute for platinum, which is more expensive. Tantalum is used to make components for chemical plants, nuclear power plants, airplanes and ...

Gold: History of Use, Mining, Prospecting, Assay & Production

In pure form gold has a metallic luster and is sun yellow, but mixtures of other metals, such as silver, copper, nickel, platinum, palladium, tellurium, and iron, with gold create various color hues ranging from silver-white to green and orange-red.

Get Price

WebElements Periodic Table » Platinum » compounds information

This section lists some binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and some other compounds of platinum. For each compound, a formal oxidation number for platinum is given, but the usefulness of this number is limited for p .

Get Price

history essay – Platinum Term Papers

Do you consider the 1950s a positive or negative period in U.S. history? 3) Describe and explain the origins and conduct of the Cold War between the aftermath of World War II and the end of the Vietnam War (1975) concentrating on the key events and disputes between the super powers.

Get Price

Synthetic diamond - Wikipedia

History Moissan trying to create synthetic diamonds using an electric arc furnace ... with changes that impose new rules on how the trade can describe diamonds and diamond simulants. ... rose gold plated, or 10K gold settings, not high-carat solid gold or platinum) and only offers settings for earrings and necklaces, not rings. ...

Get Price

How Is Platinum Mined History Techniques and Photos ...

Platinum In Nature. Platinum is found in nature primarily in nuggets and grains rather than well-formed crystals, and is usually alloyed with other metals like nickel or copper. Its value in industry is platinum''s ability to resist chemical alteration and high temperatures, and its stable electrical properties.

Get Price

History Of American Money; History of Money In United ...

The History of American Money. In the 1700s, the Spanish came out with a silver coin of almost exactly the same size and weight as a thaler. It represented eight Spanish gold "reals" and was therefore called a "piece of eight." In the marketplace merchants referred to .

Get Price

Reactions - American Chemical Society

American Chemical Society: Chemistry for Life. ... Description: Describes the history of the Olympic torch, and its 135-day relay trip to Beijing for the 2008 Olympics, which included an underwater portion and a trip up Mt. Everest. Then discusses the chemistry of the torch itself, including its composition and the many different fuels used in ...

Get Price

The Platinum Print - Luminous Landscape

A platinum print seems to me to be more "photographic" and has a sense of depth and richness lacking in all but the rarest inkjet prints. While a platinum print can certainly be "sharp", the tonality gives it a certain attractive softness. Ultimately, I''m compelled by the visual " feel " of a platinum print.

Get Price

Thomas Edison - HISTORY

Thomas Edison. In his 84 years, Thomas Edison acquired a record number of 1,093 patents (singly or jointly) and was the driving force behind such innovations as the phonograph, the incandescent light bulb and one of the earliest motion picture cameras. He also .

Get Price

The History of Apartheid in South Africa - Stanford University

The History of Apartheid in South Africa. South Africa (see map) is a country blessed with an abundance of natural resources including fertile farmlands and unique mineral resources. South African mines are world leaders in the production of diamonds and gold as well as strategic metals such as platinum.

Get Price

How Is Platinum Extracted? | Reference

Full Answer. Platinum is an incredibly rare metal that is mined and extracted in a variety of different ways depending on the technological sophistication of the miners attempting to extract it. It is incredibly difficult to find in large pure quantities, so it needs to be extracted from the ore in a very specific way.

Get Price

Platinum | Define Platinum at Dictionary

Word Origin and History for platinum. n. metallic element, 1812, Modern Latin, from Spanish platina "platinum," diminutive of plata "silver," from Old French plate or Old Provençal plata "sheet of metal" (see plate (n.)). The metal looks like silver, and the Spaniards at first thought it an inferior sort of silver, hence the name platina.

Get Price

LED Lights - How it Works - History

1998 - Mark E. Thompson and Stephen Forrest develop the first phosphorescent OLED (PHOLED) by using an emissive later of platinum(II) octaethylporphyrin. The PHOLED is more efficient than .

Get Price

The New Platinum Hair Color Trend Is Here | W Magazine

The New Platinum Hair Color Trend Is Here. by. Jane Larkworthy. ... which she describes as oyster beige, is easier on both the eyes and the hair. ... the best platinum blondes throughout history.

Get Price

Eevee | Pokémon Wiki | FANDOM powered by Wikia

Eevee is a small, fennec fox-like creature with bushy, brown fur. Its muzzle is very -like, with a small, black, triangular nose. It has a fluffy cream-colored ruff around its neck and a short, bushy, fox-like tail with a creamy tip. Eevee has round, deep-brown eyes, long rabbit-like ears, and pink paw pads on .

Get Price

World History questions help? | Yahoo Answers

Nov 25, 2011· Which best describes the role of Nelson Mandela in ending apartheid? (Points : 3) He led a popular uprising and overthrew the existing government. He wrote a new constitution prohibiting racial discrimination. His election gave him control of the government, and he forced democratic changes. ... World History questions help?

Get Price

South Africa (Geography and History) - ThoughtCo

Geography of South Africa South Africa is divided into three major geographic regions. The first is the African Plateau in the country''s interior. It forms a portion of the Kalahari Basin and is semiarid and sparsely populated.

Get Price

History of gold - OnlyGold

A History of Gold. The discovery of gold. How gold was discovered. ... Where gold was discovered. When gold was discovered. Gold''s history. Who discovered gold. Where does gold come from. The Definitive Site For Gold 1-800-800-4485. Home; Gold Prices. Recent spot prices; ... (no other metal outside the platinum group is as heavy), and the ease ...

Get Price

Chapter 5 Assessment - Weebly

Chapter 5 Assessment pages 166–169 Section 5.1 Mastering Concepts 34. Define the following terms. ... 56. Platinum What minimum frequency of light is needed to eject a photoelectron from atoms ... Describe the relative orientations of the orbitals

Get Price

Practice Test 8 at Front Range Community College - StudyBlue

Given the patient''s past medical history, which one of the following is most appropriate? A) Transfer her to the stretcher and transport in a position of comfort. B) Place her in a supine position on the long board and pad all voids.

Get Price

Platinum Histograph (TM) - Handmade Platinum Fine Art ...

Platinum HistographsTM are instant family heirlooms to help preserve your family history. Imagine having handmade platinum prints made of your favorite family photos and your pets! ... in the paper lend itself to crisp, well-defined edges, soft gradient mid-tones, and luminescent highlights. Many people describe platinum prints as having a ...

Get Price

Platinum | chemical element | Britannica

Platinum. Placer deposits are the most productive sources of the native element. The ordinary variety of native platinum is called polyxene; it is 80 percent to 90 percent platinum, with 3 percent to 11 percent iron, plus the other platinum metals, and gold, copper, and .

Get Price

V&A · A history of jewellery - Victoria and Albert Museum

A history of jewellery. Share Ancient world jewellery. Jewellery is a universal form of adornment. Jewellery made from shells, stone and bones survives from prehistoric times. ... From about 1933 gold returned to fashion, partly because it was cheaper than platinum. Artists and designers from other fields also became involved in jewellery ...

Get Price

Platinum: The mineral native Platinum information and pictures

Platinum is the rarest and most expensive of the popular precious metals. It is much rarer then Gold. Due to its rarity and value, it is not readily available to mineral collectors and is seldom represented in in all but the highest-end mineral collections.

Get Price

Credit Cards: The Best Credit Cards of 2019 - WalletHub

1,000+ credit cards for all credit scores. WalletHub''s unique tools help you get the best credit cards for your needs. Get answers from credit card experts. WalletHub. Search Cancel. Credit Cards. ... Limited History: Wells Fargo Platinum Visa® Card: Best Credit Card for 0% Purchases: $0:

Get Price

Presidential Medals | U.S. Mint

The Presidential Medals series began as the Peace Medals series. Presidents gave medals as a sign of peace with Native American tribes, when signing peace treaties with other nations, and at other events. The tradition originated during the Colonial period when leaders gave medals to Native American chiefs to strengthen relations.

Get Price

The Official Lynyrd Skynyrd History Website - History Lessons

Skynyrd History Lessons NAME CHANGES AND TEN DOLLAR GIGS Details the earliest days of Skynyrd -- before Lynyrd Skynyrd was Lynyrd Skynyrd GOLD & PLATINUM Details the formation of Skynyrd''s Gold & Platinum album GIMME THREE STEPS Gary explains the song''s origin TOM DOWD & GIMME BACK MY BULLETS Describes the history of recording Skynyrd''s fourth ...

Get Price

Describe the history of the industry in which the company ...

Describe the target market for the company''s products and services, including the specific location, demographics, etc. 2. Complete an industry analysis for the .

Get Price