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Topic: Alkali earth metals

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	Alkali metal - Wikipedia, the free encyclopedia
		The alkali metals are a series of elements comprising Group 1 (IUPAC style) of the periodic table: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
		The alkali metals are silver-colored (caesium has a golden tinge), soft, low-density metals, which react readily with halogens to form ionic salts, and with water to form strongly alkaline (basic) hydroxides.
		Alkali metals are famous for their vigorous reactions with water, and these reactions become increasingly violent as one moves down the group.
	en.wikipedia.org /wiki/Alkali_metals (743 words)

	Unit 4: Section 1
		Metallic bonds result from the easy flow of electrons between the closely spaced enery levels of metal atoms.
		The properties that make the alkali metals disguish from other families in the periodic table is that they are soft, have many metallic properties, are soft enough to be cut with a knife, are soluble in water, can conduct heat and electricity, and the solutions of these elements are colorless.
		Alkali earth metals are also denser and not as soft as alkali metals.
	library.thinkquest.org /3310/lographics/textbook/u04s01.html (633 words)

	Alkali Metals - Search Results - MSN Encarta
		Alkali Metals, series of six chemical elements in group 1 (alternatively called Ia) of the periodic table.
		These elements are all unusually reactive for metals, but less so than the corresponding alkali metal in the same period (row) of the periodic table....
		Metals, group of chemical elements that exhibit all or most of the following physical qualities: they are solid at ordinary temperatures; opaque,...
	uk.encarta.msn.com /Alkali_Metals.html (127 words)

	Document 14.7 - Safe Handling of Alkali Metals and Their Reactive Compounds
		Alkali metals (lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and the unstable element francium (Fr)) and their alloys are used in various LLNL operations.
		Alkali metals and their alloys demonstrate good electrical and heat conductivity and are often used in their molten state.
		Il'ya I., Superoxides of Alkali and Alkaline Earth Metals.
	www.llnl.gov /es_and_h/hsm/doc_14.07/doc14-07.html (4752 words)

	TOPIC OVERVIEW
		The alkali metals are so highly reactive that they never occur free (in their elemental form) in nature, but always in combination with other elements.
		The vast majority of reactions of alkali metal compounds are acid-base reactions involving the anions associated with the alkali metals.
		Alkali metals relatively large atomic size (radii) and single electron far from the nucleus, account for their low electron densities and hence low ionization energies.
	intro.chem.okstate.edu /ChemSource/Alkalimetals/alkalimetals.html (1168 words)

	Periodic Table
		Alkali metals are bases, and are highly reactive because they have only one electron in the outermost shell.
		ALKALI EARTH METALS (Group 2) are harder, denser, stronger, and have higher melting points that the group 1 metals.
		Transition metals are not as reactive as metals in groups 1 and 2.
	home1.gte.net /vze4gq6z/id8.html (827 words)

	Alkaline earth metal Summary
		The alkaline earth metals, like the alkali metals, are too reactive to be found in nature except as their compounds; the two valence electrons completing an s-subshell are readily lost, and ions with +2 charges are formed.
		The alkaline earth metals all have a silver luster when their surfaces are freshly cut, but, except for beryllium, they tarnish rapidly.
		The alkaline earth metals, like the alkali metals, are too reactive to be found in nature except as their compounds; the two valence electrons completing an s- subshell are readily lost, and ions with +2 charges are formed.
	www.bookrags.com /Alkaline_earth_metal (3421 words)

	Metals
		The least common alkali metals are rubidium, cesium, and francium.
		The metals next to group the group 1 metals in the periodic table are the group 2 metals.
		Group 2 metals are also called the alkaline earth metals.
	www.tqnyc.org /NYC051293/metals.html (1051 words)

	CHEMystery: The Periodic Table of the Elements: Representative Metals
		The alkali metals are the group IA (1) elements in the table.
		The alkali metals crystallize with a body-centered cubic lattice in which the points are occupied by +1 ions.
		The alkaline earth metals are the group IIA (2) elements in the table.
	library.thinkquest.org /3659/pertable/repmetal.html (377 words)

	Chemical Elements.com - Alkali Metals (Site not responding. Last check: 2007-10-12)
		The alkali metals, found in group 1 of the periodic table (formerly known as group IA), are very reactive metals that do not occur freely in nature.
		As with all metals, the alkali metals are malleable, ductile, and are good conductors of heat and electricity.
		Alkali metals can explode if they are exposed to water.
	www.chemicalelements.com /groups/alkali.html (108 words)

	Alkaline Earth Metals
		Alkaline Earth Metals are softer than most other metals, and react readily with water (especially when heated) but not as much as the corresponding alkali metals.
		alchemy, which was used to describe metals that resisted fire -- the oxides of the alkaline earth metals are not affected by fire.
		The metal is widely distributed in the environment in a number of minerals and a significant amount is found in sea water.
	borntoexplore.org /chemistry/alkaline_earth_metals.htm (1289 words)

	alkalimetal
		Alkali metals, having lost their outermost electrons, have no electrons that can be excited by visible radiation.
		Lithium is a soft silvery-white lustrous metal, which can be easily cut with a knife, is highly reactive and tarnished readily in air due to the formation of a layer of lithium suboxide on the surface of the metal, and burns in air with the same brilliance of the magnesium flame.
		Alkali metal hydroxides (column I and II metal hydroxides) can be used to absorb carbon dioxide (CO) in an enclosed atmosphere, like in a space craft or submarine.
	www.chem.latech.edu /~upali/chem281/281GRCc10.htm (4363 words)

	Alkaline earth metal - Wikipedia, the free encyclopedia
		The alkaline earth metals are a series of elements comprising Group 2 (IUPAC style) of the periodic table: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra).
		The alkaline earth metals provide a good example of group trends in properties in the periodic table, with well characterised homologous behaviour down the group.
		"Earth" is an old term applied by early chemists to nonmetallic substances that are insoluble in water and resistant to heating--properties shared by these oxides.
	en.wikipedia.org /wiki/Alkaline_earth_metal (649 words)

	Periodic Table
		Elements straddling the boundary such as B, Si, Ge, and As have properties intermediate between metals and nonmetals and are often termed metalloids.
		For representative elements, the number of valence electrons in an atom corresponds to the number of the family in which the atom is found.
		Metals tend to have fewer valence electrons, and nonmetals tend to have more valence electrons.
	mtsu32.mtsu.edu:11233 /111-ch3.html (1762 words)

	GCSE Group 1 ALKALI METALS revision notes at Doc Brown's GCSE Chemistry Clinic. teaching summary notes diagram diagrams ...
		The Alkali Metals form Group 1 of The Periodic Table, and called so because they form oxides and hydroxides that dissolve in water to give alkaline solutions.
		Some of their physical properties are typical of metals and some are not so typical of metals.
		If a lump of lithium, sodium or potassium is placed in cold water, the metal floats, it may melt and move around the surface of the water with 'fizzing'.
	www.wpbschoolhouse.btinternet.co.uk /page03/Alkali_Metals.htm (1352 words)

	Chemistry : Chapter 4 : Names of Chemical Compounds (Site not responding. Last check: 2007-10-12)
		Ionic compounds are normally a combination of a metal, which forms the cation, and a nonmetal or combination of nonmetals, which form the anion.
		Two groups of metals with only one common charge are the alkali metals (group 1A) and the alkali earth metals (group 2A).
		Alkali metals always have a charge of +1, which is, not coincidentally, the group number and the number of electrons that, when lost, give the metal a noble gas electron configuration.
	www.wwnorton.com /chemistry/concepts/chapter4/ch4_1.htm (2420 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		The material which is in an uncarbonized from is treated in an aqueous acid solution at a desired concentration for a selected period of time at an elevated temperature, within a desired range, preferably accompanied by motion between the aqueous acid and the material.
		The treated material is then rinsed in a solvent substantially free of metallic ions, at an elevated temperature within a desired range and for a selected period of time.
		Magnesia or magnesium oxide is an alkaline earth metal oxide.
	www.lycos.com /info/alkaline-earth-metal--alkaline-earth-metals.html (304 words)

	PTJump
		Alkali Metals are never found in nature in their pure form because they are so highly reactive with other elements.
		The alkali metals in their pure forms are not widely used.
		The transition metals are made up of all of the elements in families 3 - 12 in the middle of the periodic table.
	www.mlms.logan.k12.ut.us /~mlowe/PTJump.html (1370 words)

	Alkali Earth Metals
		Alkali earth metals have an explode reaction when exposed to water.
		These metals have only one electron in their outer shell and readily lose the one electron in ionic bonding with other elements.
		These metals have only one positron in their outer shell and readily lose the one positron in ionic bonding with other elements.
	www.matter-antimatter.com /alkali_earth_metals.htm (128 words)

	Chemistry International
		metallic element with an atomic weight greater than 40 (starting with scandium; atomic number 21); excluded are alkaline earth metals, alkali metals, lanthanides, and actinides [15]
		heavy metals is a collective term for metals of high atomic mass, particularly those transition metals that are toxic and cannot be processed by living organisms, such as lead, mercury, and cadmium [29]
		heavy metals is the name of a range of very dense alloys used for radiation screening or balancing purposes.
	www.iupac.org /publications/ci/2001/november/heavymetals_t1.html (749 words)

	The MSDS HyperGlossary: Alkali Metal
		In their elemental forms, the alkali metals are all soft, ductile, malleable substances that can be easily cut with a knife or drawn into a wire.
		Alkali metals are quite reactive towards air and water, with increasingly dangerous reactivity as one moves down the column from Li to Cs.
		When working with alkali metals, be sure you have a fire extinguisher that is approved for Class D fires.
	www.ilpi.com /msds/ref/alkalimetal.html (658 words)

	alkali metals — FactMonster.com
		Compared to other metals they are soft and have low melting points and densities.
		Alkali metals are powerful reducing agents and form univalent compounds.
		alkali - alkali [Arab., al-gili=ashes of saltwort], hydroxide of an alkali metal.
	www.factmonster.com /ce6/sci/A0803359.html (157 words)

	The Parts of the Periodic Table
		They have higher ionization energies than the alkali metals, and are also smaller than the alkali metal in the same period.
		The alkali earth metals have much higher melting points than the alkali metals: beryllium melts at 1287ºC, magnesium at 649ºC, calcium at 839ºC, strontium at 768ºC, barium at 727ºC, and radium at 700ºC. They are harder metals than the Group 1A elements, but are soft and lightweight compared to many of the transition metals.
		Salts of the Group 2A metals are less soluble in water than those of Group 1A because of the higher charge densities on the 2+ cations; nevertheless, many Group 2A salts are at least moderately soluble.
	www.angelo.edu /faculty/kboudrea/periodic/periodic_main2.htm (229 words)

	Alkali Metals Elements
		The 6 elements classified as "Alkali Metals" are located in Group 1 elements of the Periodic Table.
		Elements classified as Alkali Metals are very reactive metals that do not occur freely in nature.
		Alkali metals are soft, malleable, ductile, and are good conductors of heat and electricity.
	www.periodic-table.org.uk /alkali-metals.htm (239 words)

	Alkali Metals
		The world "alkali" comes from the Arabic "al qali", meaning "from ashes", because two highly important alkali metals, sodium and potassium, came from ashes.
		This alkali metal is named for the Latin "coesius", which means "sky blue", because of its spectral emission lines.
		This alkali metal is the softest metal known.
	borntoexplore.org /chemistry/alkali_metals.htm (1426 words)

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