Essays Tagged: "atomic weight"

The Chemical Element Florine

s since it is highly toxic. Below is the atom structure of fluorine.FACT FILEName: FluorineSymbol: FAtomic Number: 9Atomic Weight: 18.9984032(5.)Group in Periodic Table: 17Period in Periodic Table: 2G ... its compounds are used in producing isotopically fractionated uranium (UF6) which is used in making atomic bombs.*Commercial fluorochemicals including many heat-resistant plastics.*Fluorochloro hydroc ...

(3 pages) 47 0 4.0 Aug/2002

Subjects: Science Essays

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 ...

(2 pages) 45 0 4.2 Feb/1997

Subjects: Science Essays > Chemistry

Technetium

Nalin BalanNUCL 200Paper due 02/07/97TECHNETIUMAtomic Number: 43Atomic Symbol: TcAtomic Weight: (97)Electron Configuration: -18-13-2History, Proper ... new theories of the production of heavy elements in the stars. Nineteen isotopes oftechnetium, with atomic masses ranging from 90 to 108, are known. 97Tc has a half-life of 2.6 x 10^6 years. 98Tc has ...

(2 pages) 31 1 3.0 Feb/1997

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 ...

(4 pages) 52 0 4.0 Mar/1997

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 ...

(5 pages) 71 0 3.0 Nov/1996

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 ...

(10 pages) 205 0 3.5 Nov/1996

Subjects: Science Essays > Chemistry

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 ...

(2 pages) 60 1 3.3 Nov/2002

Subjects: Science Essays > Chemistry

Making Money Project: Chromium vs. Cadium.

efractories. It is also widely used as body trim on automobiles and other vehicles. Chromium has an atomic weight of 51.996; the element melts at about 1857° C (about 3375° F), boils at about ... uitable as a coin. Cadmium melts at 321° C (610° F), boils at 765° C (1409° F). The atomic weight of cadmium is 112.41.I considered both metals but after comparing the two I would choo ...

(2 pages) 28 0 0.0 Jun/2003

Subjects: Science Essays > Chemistry

This is a full report on elemental Mercury.

121 neutrons in a neutral atom. It is in the 6th period, and the 12th group. A neutral atom has an atomic weight of 200.59 AMU. It is a silver color, and it is metallic.Mercury is the only common met ... where, or when Mercury was discovered. All we know is that it was discovered in ancient times. The atomic symbol, Hg, comes from the Latin word "hydrargyrum" which means "liquid silver". It is named ...

(1 pages) 31 0 3.0 Dec/2003

Subjects: Science Essays > Chemistry

This is a full report on elemental Mercury.

121 neutrons in a neutral atom. It is in the 6th period, and the 12th group. A neutral atom has an atomic weight of 200.59 AMU. It is a silver color, and it is metallic.Mercury is the only common met ... where, or when Mercury was discovered. All we know is that it was discovered in ancient times. The atomic symbol, Hg, comes from the Latin word "hydrargyrum" which means "liquid silver". It is named ...

(1 pages) 26 0 4.0 Dec/2003

Subjects: Science Essays > Chemistry

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 ...

(2 pages) 44 2 4.9 Feb/2004

Subjects: Science Essays > Chemistry

History of the periodic table--Alexandre Beguyer de Chancourtois

)oIn 1863, a 44 year old French geologist, he created a list of the elements arranged by increasing atomic weight. The list was wrapped around a cylinder so that several sets of similar elements lined ... the first geometric representation of the periodic law.oIn 1862 was the first person to make use of atomic weights to reveal periodicity (i.e. when the elements were arranged according to their atomic ...

(1 pages) 78 1 1.7 Mar/2004

Subjects: Science Essays > Chemistry

Silicon

ps of potassium in a silica container and then carefully washing away the residual by-products. The atomic number is 14, atomic weight: 28.086, melting point: 1687K (1414°C) or 2577°F), boilin ...

(3 pages) 58 0 5.0 Apr/2004

Subjects: Science Essays

History of the atom nickel

Name: nickel Symbol: Ni Atomic number: 28 Atomic weight: 58.6934 (2)Minerals containing nickel were of value for colo ... oposed a mechanical universe with small solid masses in motion.1803 John DaltonProposed an "atomic theory" with spherical solid atoms based upon measurable properties of mass.1832 Mich ... lar properties. He discovered that the properties of elements "were periodic functions of the their atomic weights". This became known as the Periodic Law.1873 James Clerk MaxwellProposed elec ...

(4 pages) 24 0 3.7 Jun/2004

Subjects: Science Essays > Chemistry

Cobalt & Lithium

y a Swedish scientist Georg Brandt. The origin of its name means evil spirit. It is a metal with an atomic number of 27 and an atomic weight of 58.933200 amu's. Its symbol is Co and it resides in Grou ... to store lithium is in liquid paraffin, oil or kerosene which all contain no air. Lithium's atomic number is 3. It contains 3 protons and 4 neutrons. It also has a total of 2 energy levels, th ...

(1 pages) 14 0 0.0 Dec/2004

Subjects: Science Essays > Chemistry

Chlorine: Biography and the Dangers Related.

lemental state in nature, although it is widely distributed in combinations with other elements.The atomic weight of chlorine is 35.45, and its atomic number on the periodic table is 17. Related compo ...

(2 pages) 40 0 4.0 Dec/2005

Subjects: Science Essays > Chemistry

Silver Essay: this is a report on silver

SilverAtomic Number:47Atomic Weight: 107.8682Melting Point: 1234.93K (961.78C)Boiling Point: 2435K (2162C) ...

(1 pages) 3828 0 3.0 Feb/2006

Subjects: Science Essays > Chemistry

Argon

ess, and tasteless gas. It does not react with other chemicals, so therefore it is inert. It has an atomic number of 18, meaning that it has 18 protons. It has an atomic weight of 39.948. Its density ... er's International Encyclopedia, the periodic table is the table of elements in order of increasing atomic number. It is arranged in rows and columns to illustrate periodic similarities and trends in ...

(3 pages) 19 1 4.8 Oct/2001

Subjects: Science Essays > Chemistry

Copper report

it's exact discoverer is unknown. Cu is Copper's chemical symbol. It contains 29 protons/electrons (atomic number) and 35 neutrons. It's atomic weight is 65.39. Copper is an orangy, red metal that is ...

(1 pages) 14 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

Avogadro

dro's number. Shortly thereafter, in 1860 Cannizarro used Avogadro's hypothesis to develop a set of atomic weight, weighing 1/16 that of an oxygen atom. Over the next one hundred years, more accurate ...

(1 pages) 868 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry