Essays Tagged: "Atomic number"
Magnesium, a description of the element
Magnesium is silvery-white, flammable, and lightweight. The atomic number for magnesium is 12 and weights 24.312. Magnesium melts at 650K and boils at 1107K.Jos ...
Subjects: Science Essays > Chemistry
Uranium.
Uranium.Uranium was discovered in the 1700's in the coal mines of bohemia and Jachlovikna.Uranium's atomic number is 92, its Symbol is U and the atomic mass of uranium is 238.0289. Miners called it Pe ... deleev in his famous perodical classification of the elements by chemical properties and increasing atomic mass.Experimentation with uranium lead to many discoversies such as the X-ray byWilhelm R&oum ...
Subjects: Science Essays > Biology
Uranium.
Uranium.Uranium was discovered in the 1700's in the coal mines of bohemia and Jachlovikna.Uranium's atomic number is 92, its Symbol is U and the atomic mass of uranium is 238.0289. Miners called it Pe ... deleev in his famous perodical classification of the elements by chemical properties and increasing atomic mass.Experimentation with uranium lead to many discoversies such as the X-ray byWilhelm R&oum ...
Subjects: Science Essays > Chemistry
Mercury
allic element that is a liquid at room temperature, it is one of the transition elements. Mercury's atomic number is 80. It is superconductive when cooled to within a few degrees of absolute zero. Mer ... is resistant to alkalies. Mercury melts at -39C, boils at about 357C,and has a gravity of 13.5. The atomic weight of mercury is 200.59. Mercury comes in its pure form or combined with silver in small ...
Subjects: Science Essays > Chemistry
Plutonium
lab. The official chemical symbol for plutonium is Pu, coming from its first and third letters. Its atomic number is ninety-four. Plutonium is able to maintain its solid state until very high temperat ... ing it into plutonium. Shortly after, Seaborg was able to isolate plutonium 239, an isotope used in atomic bombs.Plutonium is a highly dangerous and poisonous element because it rapidly gives off radi ...
Subjects: Science Essays > Chemistry
Iron
s still easy to work. Iron is a active metal and will combine with halogens, carbon, etc. It has an atomic weight 55.847, it's atomic number is 26, it's specific gravity is 7.86, it's melting point is ...
Subjects: Science Essays > Chemistry
Chlorine
t: ChlorineGeneral InformationWe researched the chemical element known as chlorine. Chlorine has an atomic number of 17 and an atomic weight of 35.453. It has a valence number of 3. The element has 3 ...
Subjects: Science Essays > Chemistry
Oxygen
sms.Oxygen is a gaseous chemical element in Group VA of the periodic table. The chemical symbol for atomic oxygen is O, its atomic number is 8, and its atomic weight is 15.9994. Elemental oxygen is kn ... nd its atomic weight is 15.9994. Elemental oxygen is known principally in the gaseous form as the diatomic molecule, which makes up 20.95% of the volume of dry air. Diatomic oxygen is colorless, odorl ...
Subjects: Science Essays > Chemistry
Rates of reaction
ctive. In group 2 (or IIa) of the periodic table,magnesium is one of the alkaline earth metals. The atomic number ofmagnesium is 12.Magnesium(s) + Hydrochloric acid(aq) = Magnesium Chloride(aq) +Hydro ...
Subjects: Science Essays > Chemistry
Lead and environment
rld's most useful substances, and one that never ceases to find a role inhuman society.Lead has the atomic symbol of Pb (for plumbum, lead in Latin). The atomic numberfor lead is 82 and the atomic mas ...
Subjects: Science Essays > Environmental Science
What you need to know about HYDROGEN.
charge, and 1 electron, which has a negative charge as well. Hydrogen has a chemical symbol H. Its atomic number is 1. Its atomic weight is 1.0079. The term hydrogen comes from two Greek words meanin ...
Subjects: Science Essays > Chemistry
Tungsten (the element).
iodic table that is represented by a 'W'. Without it we would in a different world. Tungsten has an atomic number of seventy-four (74) and can be found on the periodic table to the right of Tantalum. ... rgy Level: 8Third Energy Level: 18Fourth Energy Level: 32Fifth Energy Level: 12Sixth Energy Level: 2Atomic Weight: 183.86
Subjects: Science Essays > Chemistry
A basic outline of the Element Iron. Useful for replacing a lab on Iron (if so instucted), or as a brief history of Iron.
Irons periodic identification is "FE". Iron has an atomic mass of 55.845 AMU and its atomic number is 26. The melting point for iron is 1535.0 °C ( ...
Subjects: Science Essays
Aluminium.
Intro: Aluminum or aluminium has an atomic number of 13. Its symbol is Al and it is located in group13 (IIIA), period 3.History: The sto ... uantities of a compound named alumina.Characteristics:Aluminum is a soft, light, silvery metal. The atomic weight of aluminum is 26.9815 or rounded off as 27. This solid melts at 660.32o C and boils a ...
Subjects: Science Essays > Environmental Science
Aluminum. Number
are oxygen and silicon, thus making aluminum the far most abundant metal on earth. Aluminum has the atomic number thirteen and the chemical symbol Al. It has had many names over the years, including a ...
Subjects: Science Essays > Chemistry
This essay is about the element Plutonium. It describes the history, the uses-past and future, all isotopes of this material, apperance, electron configuration, and the half life.
u". Plutonium is one of the transuranium elements in the actinide series of the Periodic Table. Its atomic number is 94. Plutonium has an atomic mass of 244 and a density of 298K. Pu melts at 914 degr ... 3, 244, 245a, 246, 247. It boils at 3505 degrees Kelvin and it has a specific heat of J/gK .13. The atomic radius is A- and the electron configuration is [Rn]7s25f6. At room temperature, plutonium app ...
Subjects: Science Essays > Chemistry
Radioactivity.
tivityBy: lilticklemeelmo_23Radioactivity a.k.a. radioactive decay, is the steps taken in which the atomic nuclei of unstable isotopes release fast-moving particles and energy. There are three types o ... atom. There are two ways radiation can travel either as particles or waves. It does not change the atomic mass or the atomic number of the atom that was formed. If it travels through a human body, it ...
Subjects: Science Essays > Chemistry
Iron- about its elemental properties and history of the metal.
is a silvery metal and its nuclei are extremely stable. Its symbol on the periodic table is Fe. Its atomic number is 26 and its atomic mass is 55.845. Its melting point is 1535 degrees Celsius and its ...
Subjects: Science Essays > Earth Sciences > Geology & Geosciences
THis is a general report on copper. It describes it's physical properties, chemical properties, and its uses.
o prehistoric times in 9000BC. Signs of its uses were found in Iraq and North Africa. Copper has an atomic weight of 63.546 and its atomic number is 29. Its melting point is 1084.62 °C and 1984.32 ...
Subjects: Science Essays > Chemistry
Chemical Properties of the element Barium
th other elements it becomes quite useful. Located in the alkaline earth metal group, Barium has an atomic number of 56 and has an atomic mass of 137.327. The mass is made up of 56 protons and 81 neut ...
Subjects: Science Essays > Chemistry