chemistry
January 27th, 2012 at 05:26pm
Under chemistry
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.
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Why Does Helium Change Your Voice
January 23rd, 2012 at 01:04pm
Under chemistry
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.
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How Many Isotopes Does Argon Have
December 21st, 2011 at 12:42pm
Under chemistry
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.
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Why Does Copper Turn Green
October 27th, 2011 at 12:44pm
Under chemistry
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.
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How Many Isotopes Does Aluminum Have
October 13th, 2011 at 12:33am
Under chemistry
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.
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How Many Isotopes Does Neon Have
September 26th, 2011 at 12:29pm
Under chemistry
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.
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Why Does Hot Air Rise
September 23rd, 2011 at 12:59am
Under chemistry
It is estimated that over 1000 eye injuries occur every day in the United States. These injuries can lead to permanent eye damage or even a loss of vision. Most of these eye injuries could have been prevented by wearing the right type of eye protection, such as safety glasses.
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Why Are Safety Glasses Important
June 19th, 2011 at 01:00am
Under chemistry
The periodic table is a graphic display of all the known chemical elements that have been discovered. It gives details about their atomic number and chemical symbol. The elements are grouped together according to similar properties that they possess. The table is color-coded to show different groups such as the alkali metals, the alkali earths, the halogens, and the noble gases. It is used primarily in the study of chemistry and physics as it shows how different elements will interact with one another. It is also used in fields such as geology, biology, materials science, engineering, agriculture, medicine, nutrition, environmental health, and astronomy. It was invented by Russian chemist Dmitri Mendeleev.
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How Many Elements Are In The Periodic Table
July 9th, 2010 at 12:19am
Under chemistry
Carbon monoxide, CO, is a tasteless, colorless and odorless gas. So what makes carbon monoxide so dangerous to humans and animals? This post will answer that question!
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Why is Carbon Monoxide Dangerous
May 13th, 2010 at 01:30am
Under chemistry
Sodium is an essential element for life. It is present in fairly high quantities in the Earth’s oceans and rivers. Here is a list of some of the common uses of sodium in today’s world.
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Uses of Sodium
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