are halogens ewg or edg?
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Halogens: A Special Case Halogens are very electronegative. This means that inductively they are electron withdrawing. However, because of their ability to donate a lone pair of electrons in resonance forms, they are activators and ortho/para directing.
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Hoewel de e-sigaret minder ongezond is dan tabakssigaretten, bevat de damp van e-sigaretten een aantal ingrediënten en chemische onzuiverheden in hoeveelheden die schadelijk zijn voor de gezondheid. Dat blijkt uit onderzoek van het RIVM Rijksinstituut voor Volksgezondheid en Milieu .
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They are stable in aqueous solution or in the form of salts. Halogens generally form four series of oxoacids namely hypohalous acids (+1 oxidation state), halous acids (+3 oxidation state), halic acids (+5 oxidation state) and perhalic acids (+7 oxidation state). Chlorine forms four types of oxoacids.
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Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).
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The halogens have low melting points and low boiling points. This is a typical property of non-metals. Fluorine has the lowest melting and boiling points. The melting and boiling points then increase as you go down the group.
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The elements of Group 17 (fluorine, chlorine, bromine, iodine, and astatine) are called the halogens. The halogens all have the general electron configuration ns2np5, giving them seven valence electrons. They are one electron short of having full outer s and p sublevels, which makes them very reactive.
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Tertiary alkyl halide (3o alkyl halide; tertiary haloalkane; 3o haloalkane): An alkyl halide (haloalkane) in which the halogen atom (F, Cl, Br, or I) is bonded to a tertiary carbon. Tert-butyl chloride (2-chloro-2-methylpropane), a typical tertiary alkyl halide.
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GE's halogen lamps look just the same as traditional bulbs, with the same bright quality light, but cut down on energy consumption by up to 30%. Available in standard candle, spherical and reflector shapes, our lamps create a stunning light, and can also be used with dimming switches for a cosier atmosphere.
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All of the halogens exist as diatomic molecules. This means that the elements are made up of pairs of atoms that are chemically joined together (for example, fluorine exists as F 2, chlorine as Cl 2, bromine as Br 2 and iodine as I 2).
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Halogens share many similar properties including: They all form acids when combined with hydrogen. They are all fairly toxic. They readily combine with metals to form salts.
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Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
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ESG funds are portfolios of equities and/or bonds for which environmental, social and governance factors have been integrated into the investment process. This means the equities and bonds contained in the fund have passed stringent tests over how sustainable the company or government is regarding its ESG criteria.
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Near room temperature, the halogens span all of the physical states: Fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid. All of the elements are colored, with the color becoming more intense moving down the group. Fluorine gas is pale yellow, and chlorine gas is a yellowish green.
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Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.
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Halogens. The halogen elements are a subset of the nonmetals. They comprise group 17 of the periodic table, from F through At. They generally very chemically reactive and are present in the environment as compounds rather than as pure elements.
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The halogens all have seven electrons in their outer shells. ... As the atomic number increases, the reactivity of the halogens decreases. Fluorine and chlorine exist as gases at room temperature, while bromine is a liquid, and iodine is a solid.
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Alkyl halides are excellent electrophiles because halogens share a polar bond with carbon, are polarizable, and form relatively stable leaving groups as halide anions. ... Allkyl halides can also undergo elimination reactions in the presence of strong bases.