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
Absolute advantage is the circumstance in which a company or nation is the most productive in producing a certain good or service. The efficiency is the key component of absolute advantage and does not necessarily mean that a company or nation is the most cost-effective in production, just the amount of product made in a certain time. Adam Smith coined the phrase along with a number of other economic terms that are related to one another.Full Answer >
ESL stands for English as a Second Language, whereas ELL stands for English Language Learner. Therefore, ESL is the class and ELL is the student in the class.Full Answer >
Some adjectives that describe strengths include "adventurous," "decisive," "passionate," "brilliant," "versatile" and "self-assured"; some adjectives that describe weaknesses include "dreary," "insensitive," "short-tempered," "meddlesome," "unpleasant" and "impatient." Sometimes, however, the same adjective can be used to describe both a strength and a weakness.Full Answer >
A propane fill station is a location at which you can fill or refill your propane tank instead of exchanging it, as is common at many gas stations and other locations. Thousands of propane fill stations are located throughout the United States, including in some hardware stores.Full Answer >