Introduction

• History: The element of phosphorus was discovered by Hennig Brand in Germany in 1669.
  
• Uses: This element has an assortment of uses in our world today in medicine, heath, matches, foods fertilizers, and many other things.
  
• Basic Info: Phosphorus has a atomic number of 15 and an atomic mass of 30.97, it has a density of 1.83 g.cm -3 at 20 °C, a boiling point of 280 °C and a melting point of 44 °C. In its pure form phosphorus is white, which is the most dangerous form of phosphorus.
  
• Where Phosphorus is found: Phosphorus can be found in our environment in phosphate rocks and in plants.

The Internet Resources

• Phosphorus - This site gives information on the properties like the atomic number is 15 and the atomic mass is 30.97. Phosphorus was discovered by Henning Brand in Germany in 1669. It includes uses in fertilizers and detergents phosphorus in our world today. The site is layed out in a very clear manner and is easy to obtain information from. This website would be good for middle school students and up.

• Phosphorus - This website contains basic information of phosphorus such as the symbol (P), atomic number (15), atomic mass (30.97), white color, and the standard solid state. This site is good for getting quick facts about phosphorus. It contains a picture of phosphorus as well. This site is good for middle school students and older.

• periodic table: phosphorus - This site lays out the facts of phosphorus like the atomic number: 15, atomic mass: 30.97376 amu, melting point: 44.1 °C (317.25 °K, 111.38 °F), boiling point: 280.0 °C (553.15 °K, 536.0 °F), number of protons/electrons: 15, number of neutrons: 16, quick and concise fashion. Along with being easy to read it gives a model of the atom structure of phosphorus. It also lists the history of phosphorus. An addition link about phosphorus is listed as well.

• Phosphorus - This website lays out the facts on phosphorus in data tables. This website is very informative for a more mature readers. It provides information on the states, energies, appearance and characteristics, reactions and conductivity of phosphorus. For example the atomic number is 15 and the atomic mass is 30.97376 amu. It gives in depth information of the history of phosphorus too, like it was discovered in 1669 by a German chemist. This site is good for an audience of students in high school or older.

• Periodic Table of Elements: Phosphorus - This is a very in depth website which lays out all of the information in link form to obtain the information. This site contains diagrams, formulas and all of the basic facts on phosphorus like the atomic number is 15 and the atomic mass is 30.97376 amu and the melting point is 44.1 °C (317.25 °K). The site has information for people of all ages. The site provides the history of phosphorus, and says that it was discovered by Henning Brand a German Chemist, and it includes other links on phosphorus.

• Phosphorus - This site gives all of the basic information on Phosphorus. The information is given in a very direct manner. The site provides information on the atomic number: 15, atomic mass: 30.97376 amu, symbol: P, and a brief description about the black and white colors of phosphorus and how it takes on different forms depending on its color. This website would be very good for a younger audience.

• chemglobe: phosphorus - This website is for college students or chemists. It is very informative and specific in its information, for example: Symbol: P atomic number: 15, atomic mass: 30.9737620, group: Non-Metal, atomic radius: 1.23 Å, ionic radius: 0.17 Å, covalent radius: 1.06 Å, atomic volume: 17.0 cm©¯/mol, density (293 K): 1.82 g/cm©¯, crystal structure: Monoclinic. This site provides the basic information and physical data. It also contain a brief description of the history of phosphorus, it was discovered in 1669 by a German chemist.

• Element: phosphorus - This website is a little hard to figure out how to work, but the given information is very complete. This site gives the basic information like the atomic number: 15, atomic mass: 30.9737620, isotope information, the common ions and the elementary substances. This website has information for people of all ages, but it is a little hard to configure.

• PHOS-PHO-RUS - This website is intended for children. It has a nice picture of a chemist, and a short description of the element phosphorus like that it comes in a black, yellow and red color. The description includes a brief history: discovered in 1669 by a German chemist, the element number: 15, and what phosphorus reacts to.

• Phosphorus - This website is layed out in paragraph form and is very descriptive. The site talks a lot about the abundancy of phosphorus, and where phosphorus is found, for example it can be found in protein high foods like meats, fish, chicken, turkey, milk, cheese, and eggs. It also gives the functions of phosphorus like in forming bones and teeth, and the toxicity. This site is mainly about phosphorus and how it is related to health and diseases. The audience for this site would be for high school students and older.

• Phosphorus dietary mineral information page - This website gives information on where phosphorus can be found in the body and how it is useful and harmful to our bodies. It lists the foods that have phosphorus in it like: meat, fish, chicken, eggs, and milk, and how phosphorus helps our bodies develop in bone and teeth formation as well as most metabolic actions in the body, including kidney functioning, cell growth and the contraction of the heart muscle. This site also points out that too much phosphorus can be toxic to out bodies.

• PHOSPHORUS KIDS - This site contains the very basic information of phosphorus like its atomic number 15, and atomic mass 30.9737620. It also lists that phosphorus is very reactive and is in our plants, animals and soil. This is a perfect site for elementary students.