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rubidium isotope
Rubidium–strontium dating is a radiometric dating method used by scientists to determine the age of rocks and minerals from the quantities they contain of specific isotopes of rubidium (85Rb) and strontium (87Sr, 86Sr). The method is based on the fact that a parent isotope of rubidium (87Rb) deca......
1017 
Sophia
Iron
作为课程作业
Questionnaires and surveys are one of the most versatile methods of collecting data. In this article, we will explore the importance of questionnaires and surveys and discuss how to use them for effective data collection.
Questionnaires and surveys both allow people to provide informa......
Chemical Composition of Tin Bronze
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Xian Bronze
Xian bronze is an alloy that dates back to the Shang Dynasty of China (1600-1046 BC). The alloy was first created during the period where Xian was the imperial capital of China and has since become a timeless symbol of the nation. It is a true brass material, composed of two distinc......
Chemical composition of some special bronzes
Bronze is a metal alloy composed of a combination of copper, tin, and occasional trace elements. Most bronze components are composed of at least 90 percent copper and tin, with other metals and elements such as aluminum, manganese, zinc, and phosphorus typically making up the remainder.
The main ......
Chemical Composition of Cast Tin Bronze
The Chemical Composition of Tin and Bronze Casting
Tin and bronze are two important metals in metal casting. The metal casting industry has been using these metals for centuries due to their strength and durability. The chemical composition of these metals is essential to understand in order to e......
Gold and silver alloy
Introduction
Coins were originally crafted from silver and gold alloys, developed in the Lydian or Greek era, between 650 and 600 B.C. This is according to historians such as Herodotus, Strabo, and Plato. Over the years, ancient civilizations developed their own coin designs to reflect their vari......
925 sterling silver
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925 Silver—A Treasure That Every Detail Tells
In the world of metal, 925 silver is special among them all. Known around the world, 925 silver is a mark of fine quality that has been valued since its discovery in ancient times. 925 silver is an alloy that is made up of 92.5% p......
Precious and rare metals
Precious Metals
Precious metals are rare, naturally occurring metallic elements. Precious metals have a relatively high economic value. Names of some of these precious metals include gold, silver, platinum, palladium and sometimes rhodium. Precious metals are not derived from minerals or rocks, b......
gold refining
Gold Refining
Gold refining is the process of transforming raw, unrefined gold into a purer, more valuable form. From ancient times, gold has been valued for its unique characteristics, which include its color, luster, resistance to corrosion, and malleability. Historically, gold has been associa......
Comparison table of the most commonly used copper and copper alloy grades in various countries
Copper and Copper Alloys Equivalents Chart
Copper is one of the oldest and most used metals in the world. It has been found in artifacts dating back to 8000 BC and is still used today in many applications such as electrical wiring, coins, cookware and even in jewelry. Copper and its alloys are so......
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