Iron has been known since antiquity; therefore, it is unknown who first discovered the element. Artifacts of smelted iron have been found and dated to be from as early as 3000 B.C. The symbol of iron is Fe, and its atomic number is 26. Iron is classified as a metallic element.Know More
In its pure form, iron exists as a silvery-white metal than can easily rust when exposed to oxygen. It has a boiling point of 5182 degrees Fahrenheit and a melting point of 2800 degrees Fahrenheit. Its atomic weight is 55.847.
Iron is found throughout the universe and is essential to many forms of life. In humans, iron is an important part of hemoglobin, which is in the red blood cells. People who have low quantities of iron in their blood are considered anemic and can experience fatigue.Learn more about Reference Books
The difference between iron and steel is that iron is an element, and steel is an alloy of iron, small amounts of carbon and another material, usually another element like chromium. Iron is alloyed with other elements to make it stronger and more useful and to keep it from rusting.Full Answer >
In military time, 21 means 2100 or 9 PM. Military time operates on a 24-hour clock, so times beginning after 12 AM are like the following: 1 AM to 9 AM is 0100 to 0900, 10 AM to 11 PM is 1000 to 2300, and 12 PM to 11 PM is 1200 to 2300.Full Answer >
The oldest mask found is from 7000 BC. The invention of masks could potentially be older, but because the oldest masks were made of wood and leather, they did not last. They were generally similar in overall appearance but differed in style and the way they were used.Full Answer >
Jive or "jive talk" is not a language, but instead is a form of English slang associated with Black American jazz musicians. Slang is a part of language and contains very informal words that are used by a particular group, but it is not considered part of the standard vocabulary.Full Answer >