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Vanadium is a silvery-gray metal that is never found in its free form in nature. It is a chemical element with the atomic number 23 and is represented by the chemical symbol V. Despite, not being found naturally as a free metal, vanadium occurs naturally as a part of more . . . Read more
The Noble gases are a group of elements that possess many similar characteristics and properties. Noble gases as odorless, colorless, tasteless and non-flammable. They have a very low chemical reactivity. The six naturally occurring noble gases currently known are Argon (Ar), Neon (Ne), Helium (He), Krypton (Kr), Xenon (Xe) and radioactive Radon (Rn). Noble gases are used extensively in lighting welding and space exploration. Helium is also used in blimps and hot air balloons.
Helium Balloons are a popular decoration at many events, such as birthday parties and weddings. They are also popular with children, who enjoy holding them (and letting them go). When a helium balloon is released it floats and rises in the air. Have you ever wondered why this occurs? Read this article to find the answer.
Substances such as liquids, gases and solids are generally categorized into soluble and insoluble. A soluble substance will breakdown when combined with another substance, whereas an insoluble substance will not. Many substances that are said to dissolve are actually soluble and breakdown and combine with other substances. One of the most common examples of this reaction is when salt dissolves in water.
Many of us have had the experience of sucking helium from a balloon or witnessing someone else perform this act. We know that when this happens it changes the sound of our voice to produce a high, squeaky, chipmunk type sound. This effect is only temporary and lasts for a few seconds and then more helium must be breathed in to produce the effect again. Why does helium change our voice to produce high pitched sounds? Read this article to find out.
Argon is a colorless and odorless noble gas with the atomic number of 18 and the chemical symbol Ar. The name comes from a Greek word meaning “lazy” or “inactive,” which relates to the fact that argon has very low chemical reactivity. Argon is common in the atmosphere, from where it is obtained for commercial purposes. Almost all (99.60%) of this argon is the naturally occurring isotope 40Ar, but there are many other isotopes of Argon. If you want to know how many there are, keep reading to find out.
Copper is a metallic compound that is highly conductive and corrosion resistant, which makes it an important material for electrical wiring and circuitry. Copper has also often been use to make decorative items and household wares such as vases, plates, cups and bowls. Copper is naturally a reddish-orange colored metal with a metallic luster. When copper has been exposed to air for many years it often has a green patina on the surface. So why does copper appear green after many years? Read on to find the answer.
Aluminum, also written as aluminium, is a lightweight silvery-white metal. It has an atomic number of 13 and its chemical symbol is Al. Although it is the most abundant metal on Earth, it is too chemically reactive to occur on its own. It can be found combined with other elements in many different forms. The most important source of aluminum is bauxite, which is mined for the aluminum content. Aluminum is also known for its many isotopes and their uses. Let’s take a closer look at the isotopes of aluminum.
Neon is the 10th element on the periodic table, represented by the symbol Ne. it is a gas that is best known for its use in colorful neon signs. For commercial use it is extracted from the air where it is available in small traces. It is relatively rare on Earth, but it is actually believed to be a very common element throughout the universe. It was discovered in 1898 by Sir William Ramsay and Morris W. Travers in London. While studying Neon, J. J. Thomson discovered the first isotopes of a stable element; although he didn’t realize it at this time. Let’s take a look at how many isotopes of neon have been discovered.
Air is all around us, but because it is difficult to see it is often hard to understand. You have probably heard that hot air rises and cool air falls. You may have even noticed that the air is warmer on the top floor of a two story building. However, have you ever wondered about the reason that hot air rises? Keep reading to find the answer.