The most abundant are stone meteorites which are primarily made up of silicate minerals such as olivine, pyroxene, and feldspar. As their name implies, iron meteorites are mainly composed of iron but also contain a significant amount of nickel. The rarest of the three are the stony-iron meteorites. They are a mixture of stony and metallic materials. Some basic facts of meteorites are: Meteorites are attracted to magnets.
It is possible that fluorine can substitute for hydrogen in organic reactions. Fluorine has been known to form compounds with rare gases, including xenon, radon, and krypton. Free fluorine has a characteristic pungent odor, detectable at concentrations as low as 20 parts per billion. Both elemental fluorine and the fluoride ion are highly toxic. The recommended maximum allowable concentration for a daily 8-hour time-weighted exposure is 0.1 parts per million.
In contrast, mixtures are impure substances and can be made up of different compounds. Brass is a mixture of two metals, copper and zinc. (Mrs. Jacqueline Hilary Briggs, 2007) Mixtures don’t have the fixed
Web. 17 Apr. 2012. Cooper, John W. "Truman's Motivations: Using the Atomic Bomb." World War II. 9 Dec. 2009.
Bonding Formal Lab Introduction (with Background information): Any substance, whether it is a metal or nonmetal, people can determine it by seeing if it is shiny, soft, or reactive. Metals are shiny, reactive, and have high melting points, while nonmetals are soft, have low melting points and not very reactive, and that is how anyone can determine whether a substance is a metal or a nonmetal. Covalent bonding is when two atoms share electrons, but it only occurs in two nonmetals only. They have low melting points and they are not soluble. Although, Ionic bonding is when an atom gives away elections to another atom, which only happens in a metal and a nonmetal, and they have high melting points and are soluble.
Web. 12 Dec. 2010. <http://www.energybulletin.net/node/16575>. Julie Gerstein, Julie. "Gulf Oil Spill Statistics - BP Gulf Oil Spill Facts - The Daily Green.
INTRODUCTION Gadolinium is a shiny silvery white, malleable, ductile, metallic, rare earth element which is located in group 3, f-block, period 6 and classified in the series of lanthanides in the elements of periodic table and has 27 isotopes whose half-lives are known with mass numbers from 137 to 164. This element is considered a rare earth element because there is such a small amount of it, and it is not found often in its simplest form. It was discovered in 1880 by Jean Charles de Marignac where it was extracted in from the mine located in Ytterby in Sweden, but it was isolated from metal oxide in 1886 by Lecoc de Boisbaudran who named it after the Finnish Chemist Johan Gadolin who discovered the first rare earth element in 1794. Gadolinium
Pluto is a dwarf planet; it is the farthest planet from the sun. A dwarf planet is a planet that orbits around the sun. It has an orbit of 248 years that sometimes takes it inside Neptune’s orbit. Pluto is so cold that its oxygen and nitrogen, which is easy for us to breathe, is frozen solid there. This planet is two-thirds of our moon and it is the largest rock in the Kuiper belt.
Mercury is the closest planet to the sun. Mercury was named after the Roman God of Commerce and Thievery. It might have gotten its name because of the way it quickly appears and disappears from Earth's view. Mercury is the second smallest planet in the solar system; Pluto is the only planet that is smaller. Earth's diameter is about 7,200, while tiny Mercury has less than half of that size, about 3,000 miles in diameter.
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