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Chemistry / Photosyntesis
PhotosyntesisWhen you and me eat, we find our food. When plants eat, they make their own food and energy. They make their food and energy through a process called photosynthesis. Through photosynthesis oxygen is also produced. Photosynthesis is "a process in which green plants synthesize carbohydrates from carbon dioxide and water....The reverse of this reaction provides energy for plan...
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Chemistry / Pioneers In Ozone Research
Pioneers In Ozone Research Win Nobel Prize
Three fellows of the American Geophysical Union were awarded the Nobel prize in the
area of atmospheric research by the Royal Swedish Academy of Sciences in 1995. The
honored professors were: Paul Crutzen of the Max-Plank Institute for Chemistry in Mainz,
Germany; Mario Molina of the Massachusetts Institute of Technology, and F. Sherwood...
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Chemistry / Platinum
subject = Chemistry
title = Platinum
papers = Please put your paper here.
Platinum is a relatively rare, chemically inert, metallic element. It symbol
is Pt, atomic number is 78, and its atomic weight is 195.09. Platinum is one
of the heaviest substances known. One cubic foot of Platinum weighs 21 times
as much as a cubic foot of water. A grayish-white metal, Platinum has a melting
poin...
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Chemistry / Plutonium
Plutonium
Plutonium, symbol Pu, is a radioactive metallic element. It has an atomic number of 94, and it is used in nuclear reactors and weapons. The element is one of the transuranium elements in the actinide series of the periodic table.
Isotopes of plutonium were first prepared and studied by the American chemist Glenn T. Seaborg and his associates at the University of California at Berke...
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Chemistry / Quarks
In about 1900 it was theorized that the atom was composed of smaller particles. An atom is actually a system consisting of a cloud of negatively charged particles called electrons surrounding a nucleus, composed of positively charged protons and of neutrons, which have no charge. In the 1960s scientists discovered that protons and neutrons are composed of even smaller particles than first believ...
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Chemistry / Reactions
Chemical reactions are the heart of chemistry. People have
always known that they exist. The Ancient Greeks were the firsts
to speculate on the composition of matter. They thought that it
was possible that individual particles made up matter.
Later, in the Seventeenth Century, a German chemist named
Georg Ernst Stahl was the first to postulate on chemical
reaction, specifically, combus...
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Chemistry / Recrystallization Of An Impure Compound
Recrystallization Of An
Impure Compound
Lori Benkoski
Organic Chemistry
12-11-97
Purpose/Question: The purpose of this lab is to recrystallize acetanilide by refluxing the substance, filtering it out, and comparing the original mass to the mass of the pure crystals.
Equipment: Buchner Funnel 2.0 g acetanilide
Charcoal filt...
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Chemistry / Science Research Project On Elements
Properties
Properties of Chlorine
Symbol Cl
Atomic Number 17
Atomic Weight 35.453
Group in Periodic Table VII A
Density at 32ﾃつ° F (0ﾃつ° C) 3.21
Boiling Point -30.3ﾃつ° F (-34.6ﾃつ° C)
Melting Point (under pressure) -149.8ﾃつ° F (-101ﾃつ° C)
This element Chlorine is a poisonous, corrosive, greenish-yellow gas that has a sharp, suffocating odor and is two and half times heavier than...
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Chemistry / Sodium
Sodium
Life could not exist without compounds of sodium. These compounds hold
water in body tissues, and a severe deficiency of sodium can cause death.
Blood contains sodium compounds in solution. Sodium compounds are used in
industry in the manufacture of chemicals and pharmaceuticals, in metallurgy,
in sodium vapor lamps, and in the production of hundreds of every day
products. One of th...
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Chemistry / Terbium
Terbium
What is Terbium? How and what is Terbium used for in everyday human life? Where is Terbium's origination point? Many people have never even heard of the element Terbium and you may ask why not? But all these questions and more will be revealed within the body of this essay.
Terbium was discovered in a small Sweden town called Ytterby in the year of 1843, by a man named Carl G. M...
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Chemistry / The Biography Of Nitrogen
Nitrogen
This is the story of nitrogen, a significant element, a powerful element, and an often misunderstood or underestimated element. Nitrogen is one of the many elements on the Periodic Table. Like all the rest, nitrogen has its own set of unique properties, compounds, and features. This element plays an important role in modern technology and science. Although the average person may not...
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Chemistry / The Chemistry Of Natural Water
The Chemistry of Natural Water
INTRODUCTION
The purpose of this experiment is to explore the hardness of the water on campus.
Hard water has been a
problem for hundreds of years. One of the earliest references to the hardness or
softness of water is in
Hippocrates discourse on water quality in Fifth century B.C. Hard water causes many
problems in both in
the household and in the ind...
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Chemistry / The Dangers Of Chemical Warfare
How many people were killed or injured in WWI due to chemical weapons? According to
the Chemical Weapons Convention web page 1,400,000 people were affected by chemical
weapons. The most serious casualties were in Russia with 475,000 injuries and 56,000 killed.
The problems of chemical warfare are upon us yet again. Saddam Hussein is currently trying to
avoid weapon inspections by the Unite...
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Chemistry / The Discovery Of Fluorine
title = The discovery of Fluorine
The isolation of fluorine had challenged chemist for many years, taking
the lives of at least two scientists in the process. Fluorine receives its
name from the Latin, fluo, meaning flow.
The first real attempt to free
fluorine, was done by a chemist by the name of Humphyry Davy, between the years
of (1811-1813). He first tried to liberate the element by ...
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Chemistry / The History Of Radium (1898-Present)
Radium is a silver-white, highly radioactive element. It's atomic number is 88, and it is the heaviest alkali earth metal, having a mass number of 226.025 (See Figure 1). Radium has at least twenty six isotopes, and all are radioactive (Shriver 1995). Since radium is chemically similar to calcium and magnesium, it is absorbed by the bones of animals. Once in the bones, it emits alpha, beta, and ga...
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Chemistry / The Hypoxic Zone
This article is about a problem with the chemistry in a large area of the Gulf of Mexico. Basically, the problem is that every spring oxygen levels in the deepest parts of the water become so depleted that most local wildlife is suffocated or flees. This part of the Gulf of Mexico is called the hypoxic zone (obviously meaning low oxygen zone).
The cause of the problem is the Mississippi Rive...
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The Preparation and Characterization of an X-Type Zeolite Abstract: The purpose of this experiment was to prepare an X-type zeolite, and identify it by IR. In this experiment, we will prepare the sodium form of an X-type zeolite. The general formula is:Mnx(AlO2)n(SiO2)192-n where n =77-96 and x= valence of M.By combining solutions of sodium silicate and sodium aluminate, and heating to 90...
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Chemistry / The Radon Problem
THE RADON PROBLEM
You can't see radon. And you can't smell or taste it, but it may very well be a problem in your home. It is estimated to cause many thousands of deaths each year. Radon is a cancer-causing, radioactive gas, and when you breathe air containing the gas, you can get lung cancer. In fact, radon has now been declared the second leading cause of lung cancer in the United Stat...
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Chemistry / The Role Of Computers In Chemistry
The Role of Computers in Chemistry
Over the last few decades, the technology of computers has improved in leaps and bounds. Computers have become faster and easier to use, taking milliseconds to do the calculations which once had to be done by hand. There are several areas of chemistry where computers have played a significant role, a few of them I will discuss.
In synthetic chemistry it is ...
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Chemistry / The Scientific Significance Of Buckyball
The Scientific Significance of Buckyballs
by
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Chemistry ??? Section ???
General Chemistry
Prof. ?????????????
Spring 199?
Until the mid-1980's, elemental carbon was believed only to exhibit two main allotropic forms, diamond and graphite, both of which are covalent-network solids. However, Nobel Prize winning research conducted in the United States and Europe has con...
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Chemistry / Why Nuclear Fusion Is So Cool.......
Why nuclear fusion is so cool.......
For a fusion reaction to take place, the nuclei, which are positively
charged, must have enough kinetic energy to overcome their electrostatic
force of repulsion. This can occur either when one nucleus is
accelerated to high energies by an accelerating device, or when the
energies of both nuclei are raised by the application of very high
temperatur...
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Chemistry / Why Xenon Doesn't React
Why Xenon Doesn't React
Xenon is a rare, colorless, odorless, tasteless, chemically unreactive gas. It is one
of the inert gas elements found in group 0 of the periodic table. Xenon was long considered incapable of chemical reaction, but in 1962 Neil Bartlett, a Canadian chemist, reported synthesis of xenon hexafluoroplatinate, XePtF6, a true compound. Before 1962, people thought that xenon ...
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Chemistry / Your Chemical World
Your Chemical World
In today s world we rely on many different facets to achieve what we normally don t even give a second thought. As I am sitting here typing this paper I am simultaneously using the culmination of numerous chemical breakthroughs. The American Chemical Society (ACS) is a group of over 150,000 chemists, both academic and industrial. Your Chemical World, a book that the ACS h...
