
	Where results make sense

Topic: Isotope table (divided)

Related Topics

Isotope table (complete)

Exotic helium isotopes

Isotope

List of stable isotopes

Periodic table (extended)

Stable isotope

Isotopic labeling

List of elements by symbol

List of elements by number

Periodic table (standard)

List of elements by name

Barium

Periodic table

In the News (Sat 12 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Isotope
		Isotopes of a chemical element are atoms whose nuclei have the same atomic number, Z, but different atomic weights, A.
		In scientific nomenclature[?], isotopes are specified by the name of the particular element followed by a hyphen and the number of nucleons (protons and neutrons) in the atomic nucleus (e.g., iron-57, uranium-238, helium-3).
		The atomic mass for an element in the periodic table is the average of the natural abundance of the isotopes of that element.
	www.ebroadcast.com.au /lookup/encyclopedia/is/Isotope.html (886 words)

	isotope Information Center - isotope
		Isotopes are forms of an element whose nuclei have the same atomic number–-the number of protons in the isotopes of carbon nucleus--but different atomic masses because they contain different numbers of neutrons.
		In scientific nomenclature, isotopes (nuclides) what practical applications do isotopes have are specified by the name of the particular element by a hyphen and the number of nucleons (protons and neutrons) in the atomic nucleus (e.g., helium-3, carbon-12, carbon-14, stable isotopes iron-57, radioactive isotope uranium-238).
		The vibrational modes radioactive isotopes in medicine of a molecule are determined by its shape and by the masses of its constituent model of isotope neon 21 atoms.
	www.scipeeps.com /Sci-Chemistry_Topics_He_-_I/isotope.html (1087 words)

	Periodic table - Gurupedia
		The periodic table of the chemical elements is a tabular display of the known chemical elements.
		A group is a vertical column in the periodic table of the elements.
		Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late 19th and early 20th century.
	www.gurupedia.com /p/pe/periodic_table.htm (839 words)

	Kids.Net.Au - Encyclopedia > Periodic table
		The periodic table of the chemical elements is a display of the known chemical elements, arranged by electron structure so that many chemical properties vary regularly across the table.
		The original table was created without a knowledge of the inner structure of atoms: if one orders the elements by atomic mass, and then plots certain other properties against atomic mass, one sees an undulation or periodicity to these properties as a function of atomic mass.
		Despite their dramatic differences in mass within the group, their allotropes have very similar properties: They are all highly corrosive (meaning they combine readily with metals to form metal halide[?] salts); chlorine and fluorine are gases, while bromine is a very low-boiling liquid; chlorine and bromine at least are highly colored.
	www.kids.net.au /encyclopedia-wiki/pe/Periodic_table (541 words)

	Isotope table (divided) - Wikipedia, the free encyclopedia
		These isotope tables show all of the known isotopes of the chemical elements, arranged with increasing atomic number from left to right and increasing neutron number from top to bottom.
		The whole table can be found in one piece at Isotope table (complete).
		The data for these tables came from Brookhaven National Laboratory which has an interactive Table of Nuclides with data on ~3000 nuclides.
	en.wikipedia.org /wiki/Isotope_table_(divided) (102 words)

	Table Of Elements
		Boron exists naturally as 19.78% 10B isotope and 80.22% 11B isotope High-purity crystalline boron may be prepared by the vapor phase reduction of boron trichloride or tribromide with hydrogen on electrically heated filaments.
		The isotope boron-10 is used as a shield for nuclear radiation, as a control for nuclear reactors, and in instruments for detecting neutrons.
		This isotope of cobalt produces Gamma radiation which is being used in place of X-rays or alpha rays from the inspection of industrial machines to the treatment of cancer in hospitals.
	library.thinkquest.org /C0113863/bios.shtml (10673 words)

	23.2
		For isotopes with Z = 40 to be stable, the ratio of n : p must be about 1.3 : 1.0.
		For isotopes with Z = 80 to be stable, the ratio of n : p must be about 1.5 : 1.0.
		Table 23.1 compares the total binding energy and the binding energy per nucleon for several isotopes.
	www.mhhe.com /physsci/chemistry/chang7/ssg/chap23_2sg.html (1590 words)

	Reference.com/Encyclopedia/Periodic table
		The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev.
		The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize and compare all the many different forms of chemical behavior.
		In printed tables, each element is usually listed with its element symbol and atomic number; many versions of the table also list the element's atomic mass and other information, such as its abbreviated electron configuration, electronegativity and most common valence numbers.
	www.reference.com /browse/wiki/Periodic_table (2248 words)

	Atomic Structure
		The most common isotope of an element is the one that is on the periodic table.
		The decimal number on the periodic table is the atomic mass, the mass of one atom measured in atomic mass units(amu).
		When not measured in grams, the decimal number on the periodic table is called the atomic mass and is in atomic mass units(amu).
	library.thinkquest.org /10429/low/atomic/atomicbody.htm (1186 words)

	1939: Physics - Archive Article - MSN Encarta
		We now are acquainted with at least four examples of this novel type, for which the name was borrowed from biology where it is used to refer to the division of cells.
		In these four cases, the 'fissuring' nuclei are formed by the entry and absorption of neutrons into nuclei of the last three elements of the Periodic Table.
		With thorium and protactinium neutrons of high energy are required, and it is thought that the commonest isotope of each element is responsible for the whole effect.
	encarta.msn.com /sidebar_461501478/1939_Physics.html (1511 words)

	The Effects of Nuclear Weapons, 1977: General Principles of Nuclear Explosions
		Isotopes of a given element are nuclides having the same number of protons but different numbers of neutrons in their nuclei.
		An example is the fusion of the hydrogen isotope known as deuterium or "heavy hydrogen." Under suitable conditions, two deuterium nuclei may combine to form the nucleus of a heavier element, helium, with the release of energy.
		This element is known to exist in three isotopic forms, in which the nuclei have mass numbers (¤ 1.10) of 1, 2, and 3, respectively.
	www.cddc.vt.edu /host/atomic/nukeffct/enw77a.html (10113 words)

	DETERMINING AGE OF ROCKS AND FOSSILS
		In general, with the exception of the single proton that constitutes the nucleus of the most abundant isotope of hydrogen, the number of neutrons must at least equal the number of protons in an atomic nucleus, because electrostatic repulsion prohibits denser packing of protons.
		Many elements have some isotopes that are unstable, essentially because they have too many neutrons to be balanced by the number of protons in the nucleus.
		The teacher should have each team report how many pieces of parent isotope remain, and the first row of the decay table (Figure 2) should be filled in and the average number calculated.
	academic.udayton.edu /michaelsandy/determining_age_of_rocks_and_fos.htm (1396 words)

	Chemical Elements.com - Help
		Therefore, when you compute the percentages of the isotopes of H in any container, you find that the atomic mass of H is actually 1.0079.
		Atomic masses used on this periodic table are from the IUPAC 1995 recommendations.
		1: An isotope is an atom of any element with the same number of protons and electrons as all the other atoms of this particular element, but with a different atomic mass (and number of neutrons).
	www.chemicalelements.com /sup/help.html (1882 words)

	Atom - Article from FactBug.org - the fast Wikipedia mirror site
		An atom is the smallest particle differentiable as a certain chemical element; when an atom of an element is divided, it ceases to be that element.
		The mass number, atomic mass number, or nucleon number of an element is the total number of protons and neutrons in an atom of that element, because each proton or neutron essentially has a mass of 1 amu.
		The hydrogen isotope which also contains 1 neutron is called deuterium or hydrogen-2; the hydrogen isotope with 2 neutrons is called tritium or hydrogen-3.
	www.factbug.org /cgi-bin/a.cgi?a=902 (1943 words)

	Current Greenhouse Gas Concentrations
		Table 4.1 of (Intergovernmental Panel on Climate Change) IPCC 2001 unless otherwise indicated.
		Table 6.11 on page 393 of IPCC (2001).; note particularly the discussion of the uncertainty of the radiative forcing for tropospheric ozone (cf.
		Table 4.1 of IPCC (2001); it is an estimate for year 1998.
	cdiac.esd.ornl.gov /pns/current_ghg.html (1503 words)

	Bobby's Radiation Glossary (Site not responding. Last check: 2007-11-03)
		The fissile isotopes uranium-235 and plutonium-239 are used in nuclear weapons.
		Isotope: Forms of the same chemical element that have different numbers of neutrons.
		Strontium-90: A beta-emitting isotope of strontium that is chemically similar to calcium.
	www.lrri.org /radiation/radgloss.htm (2673 words)

	Document 20.6 - Criticality Safety
		If a facility requires a quantity of an isotope larger than those listed in Table 1 or exceeds the criterion for combinations of isotopes, or if activities within a facility constitute a special concern (discussed in Section 3.4), then the proposed operation will require a safety plan specifying the appropriate criticality safety controls.
		Activities with fissionable isotopes not included in Table 2 may be based on the mass limits in Table 1 provided that the activity does not constitute a special concern (see Section 3.4) and the above controls are also implemented.
		Facilities containing significant quantities of fissionable materials may be divided into a number of workstations for administrative and physical control of the fissionable material.
	www.llnl.gov /es_and_h/hsm/doc_20.06/doc20-06.html (5201 words)

	#1 Site For Learning Chemistry
		As more and more elements and their isotopes were discovered, Mendeleev’s periodic table that gave a chart of all the elements, was found to be inconsistent in many ways.
		The position of isotopes is taken care of when the elements are arranged in the ascending order of their atomic numbers.
		Similarly for the pair of Ar-K. Thus the modern periodic table of elements removed all anomalies of the Mendeleev’s periodic table, by simple considering the atomic numbers of elements.
	home.att.net /~cat6a/class_elem-V.htm (821 words)

	FM 8-9 Part I/Chptr 2 Conventional and Nuclear Weapons - Energy Production and Atomic Physics
		For example, the measured mass of the isotope fluorine-19 atom is 18.99840 amu, while the sum of the masses calculated for the individual particles of that atom is 19.15708 amu.
		identifies a uranium isotope having 92 protons and 143 neutrons (235 - 92 = 143) in its nucleus.
		Thus the isotope identified by the example notation is the naturally occurring, readily fissionable isotope of uranium used in nuclear weapons.
	www.fas.org /nuke/guide/usa/doctrine/dod/fm8-9/1ch2.htm (5769 words)

	12-Ion Microprobe Analysis
		In particular, stable isotope ratios can be used to constrain theories of fluid sources, pathways, and fluxes, mechanisms of mineral reaction and exchange, and thermal evolution.
		Commonly, analyses have been made of splits, prepared from much larger samples with the implicit assumption that measured compositions are representative of the sample as a whole and thus that samples are homogeneous at the centimeter scale or larger.
		Table 1 summarizes the capabilities of various techniques that are available for analysis of stable isotope ratios.
	www.geology.wisc.edu /zircon/new_tech/12.html (827 words)

	Neutron Acitvation Analysis
		Gamma rays are electromagnetic radiation (photons) emitted from an unstable nuclei of a radioactive isotope.
		First, the element must have an isotope that is able to appreciably react with the incoming neutrons; we say that the isotope must have a high "neutron cross-section".
		In the chart of the nuclides the stable isotopes are colored fl, so the only possible isotopes you can see in the spectra are to the right of these stable isotopes.
	ie.lbl.gov /naa (1947 words)

	page 12
		The annual volume of waste generated for each isotope is proportional to the amount of activity during that period.
		Because the minimum storage period is 10 half-lives of the isotope being stored (set by article 175 of the New York City Health Code), the maximum accumulated volume of waste to be stored for each isotope is the amount that is being generated during that period of time for each isotope.
		In other words, for isotopes whose 10-half-life period is less than a year, the maximum accumulated waste volume is less than the annual waste volume generated.
	www.columbia.edu /~gh81/decayroom.html (1276 words)

	CRCPress Periodic Table Online: Cadmium
		Natural strontium is a mixture of four stable isotopes.
		Thirty-two other unstable isotopes and isomers are known to exist.
		This isotope is one of the best long-lived high-energy beta emitters known, and is used in SNAP (Systems for Nuclear Auxiliary Power) devices, where a lightweight, long-lived, nuclear-electric power source is needed.
	chemnetbase.com /periodic_table/elements/strontium.htm (339 words)

	ipedia.com: Periodic table Article (Site not responding. Last check: 2007-11-03)
		The elements are arranged by electron structure so that many chemical properties vary regularly across the table.
		This was followed by the English chemist John Alexander Reina Newlands, who in 1865 noticed that the elements of similar type recurred at intervals of eight, which he likened to the octaves of music, though his law of octaves was ridiculed by his contemporaries.
		"Periodic Table of the Fermi Surfaces of Elemental Solids".
	www.ipedia.com /periodic_table_1.html (847 words)

	Chemistry : Chapter 1 : Overview (Site not responding. Last check: 2007-11-03)
		The percent of each isotope in an element is called its isotopic abundance.
		The periodic table not only lists all the elements, their symbols, atomic numbers, and average atomic mass, but does so in such a way as to group them by properties.
		Many periodic tables, including the one on the inside front cover of the text, have a staircase-like division that runs between aluminum (Al) and silicon (Si) and continues between germanium (Ge) and arsenic (As) to the bottom of the table.
	www.wwnorton.com /chemistry/overview/ch1.htm (1780 words)

	Lesson 2
		The smallest unit into which an element may be divided while retaining all of the characteristic properties of that element is an atom.
		Isotopes in which the number of neutrons is different from the number of protons are often unstable and radioactive.
		In the periodic table that follows, the number of protons (and in most cases, also of electrons and neutrons) is designated by the number in the lower left corner of each box in the periodic table (e.g., H has 1, Li has 3, and Na has 11 protons).
	www.biologylessons.sdsu.edu /ta/classes/lab2/lab2.html (2181 words)

Try your search on: Qwika (all wikis)