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- Periodic table (7298 bytes)
9: ...eveloped to replace both older Roman numeral systems as they confusingly used the same names to mean d...
53: ...he next-to-last group in the chart (the [[halogen|halogens]]) are [[fluorine]] (F) and [[bromine]] (Br). - Chemical element (8169 bytes)
3: ...d contain the same number of protons. However, atoms of the same element may differ in the number of n...
11: ...polyatomic]] units comprising the same kind of atoms. These are called [[allotropy|allotropes]], irres...
27: ...ams or procedures; there was no concept of one atoms combining to form molecules. With his advances in...
37: ... example, an "X" is used to indicate any of the [[halogen]] elements, while "R" is used for a radical, mean... - Chemical series (2075 bytes)
26: |style="background:#FFFF99;"| [[Halogen]]s || (periodic table group 17)
45: [[de:Serie des Periodensystems]] - Antimony (9093 bytes)
128: ... A [[metalloid]], antimony has four allotropic forms. The stable form of antimony is a blue-white meta...
131: ...tacked by [[oxidation|oxidizing]] [[acid]]s and [[halogen]]s. Antimony and some of its alloys expand on coo...
140: *small arms and tracer bullets,
152: ...asis]]. Antimony attaches itself to [[sulfur]] atoms in certain [[enzyme]]s which are used both by the...
159: ... broken pieces, granules, and cast cake. Other forms are powder, shot, and single crystals. - Astatine (5377 bytes)
21: | [[Halogen]]s
106: ...nd [[thorium]] decay and is the heaviest of the [[halogen]]s.
109: ...rometer]]s to behave chemically much like other [[halogen]]s, especially [[iodine]] (it probably accumulate... - Bromine (8073 bytes)
19: | [[halogen]]s
140: ...the symbol '''Br''' and [[atomic number]] 35. A [[halogen]] element, bromine is a red volatile liquid at ro...
143: ...agreeable odor resembling that of [[chlorine]]. A halogen, bromine resembles chlorine chemically but is les...
167: Approximately 500 million kilograms ($350 million USD) of bromine are produced per ye... - Chlorine (10751 bytes)
2: {{Elementbox_series | [[halogen]]s }}
39: ...it is abundant in nature and necessary to most forms of life, including the human body. As chlorine ga...
44: This element is a member of the [[salt]]-forming halogen series and is extracted from chlorides through [[...
49: ...sed widely in the manufacture of many everyday items.
76: Chlorine irritates respiratory systems especially in children and the elderly. In its ga... - Fluorine (8588 bytes)
2: {{Elementbox_series | [[halogen]]s }}
34: ...ale [[yellow]]-[[green]], [[univalent]] gaseous [[halogen]] that is the most chemically reactive and [[elec...
37: ...tronegative]] of all the elements, and readily forms compounds with most other elements. Fluorine even...
40: Other forms are fluoro-[[complex (chemistry)|complex]]es (suc... - Gold (24329 bytes)
94: | 45.2 [[siemens (unit)|MS]]/m
160: ...r use in [[coin]]s and [[jewelry]]; conversely, [[halogen]]s will chemically alter gold, and [[aqua regia]]...
169: *Gold performs critical functions in [[computer]]s, communicatio...
202: ... of Sweden]], form the base of many monetary systems.]]
210: On [[March 17]] [[1968]], economic circumstances caused the collapse of the gold pool, and a... - Hafnium (9162 bytes)
162: ...l is resistant to concentrated [[alkali]]s, but [[halogen]]s react with it to form hafnium tetrahalides. At...
174: ...ield weapons with simple x-ray triggering mechanisms—the ''hafnium bomb''. There is considerable... - Iodine (11416 bytes)
20: | [[halogen]]s
139: ...halogen]]s, and the most electropositive metallic halogen. Iodine is primarily used in [[medicine]], [[phot...
142: ...that has an irritating odor. This halogen also forms compounds with many elements, but is less active ...
149: *One of the [[halogen]]s, it is an essential [[trace element]]; the [[t...
172: ...ly biophilic, and occurs in multiple [[ion]]ic forms (commonly, I- and iodate) which have different ch... - Lanthanum (10184 bytes)
102: ...silicon]], [[phosphorus]], [[sulfur]], and with [[halogen]]s. It oxidizes rapidly when exposed to air. Cold... - Platinum (10600 bytes)
8: ...enter" | [[Palladium|Pd]]<br />'''Pt'''<br />[[Darmstadtium|Ds]]
68: ...lectrical conductivity]] || 9.66 [[siemens (unit)|MS]]/m
162: ...]]s, incorporated in [[automobile]] exhaust systems.
166: ...emperature but can be corroded by [[cyanide]]s, [[halogen]]s, [[sulfur]], and caustic [[alkali]]s. This met...
198: This metal doesn't normally cause health problems due to its unreactive nature but all compounds of... - Ruthenium (10241 bytes)
158: ...is, is not attacked by acids but is attacked by [[halogen]]s at high temperatures and by hydroxides. Small...
175: ...ium oxide contained a new metal and obtained 6 grams of ruthenium from the part of crude [[platinum]] ...
202: ...that it has two forms (yellow and pink). These forms are identical once they are dissolved but differe... - Silicon (13233 bytes)
44: ..., and because its [[passivation|native oxide]] forms better semiconductor/dielectric interfaces than a...
47: ...tively inert element, silicon still reacts with [[halogen]]s and dilute [[alkali]]s, but most [[acid]]s (ex...
70: ...lint, [[jasper]], and [[opal]] are some of the forms in which the oxide appears. [[Granite]], [[asbest...
105: ..., this technique was plagued with practical problems (such as the [[zinc chloride]] byproduct solidify... - Silver (15157 bytes)
145: ...se of silver is as a [[precious metal]] and its [[halogen|halide]] salts, especially [[silver nitrate]], ar...
203: ...t causing noticeable harm to more complex life-forms. [[Hippocrates]], the father of modern medicine, ...
205: ...ounds are used to accelerate healing in burn victims.
209: ...ing pools do not use silver due to staining problems so they instead used copper-zinc colloids instead... - Titanium (20884 bytes)
115: ...arth]]. There are two [[allotropy|allotropic]] forms and five naturally-occurring [[isotope]]s of this...
120: ...e [[nitrogen]] gas (it burns at 800° C and forms [[titanium nitride]]).<!-- many sources incorrect...
122: ...ith [[chlorine]]. It also reacts with the other [[halogen]]s and absorbs [[hydrogen]].
125: ...thening filler in paper and [[cement]] and in [[gemstone]]s.
133: ...is used to produce relatively soft artificial [[gemstone]]s. - Ununseptium (2081 bytes)
17: |[[Chemical series]]||Presumably [[Halogen]]s - History of the periodic table (7005 bytes)
16: From this law, D?einer went on to discover the [[halogen]] triad composed of [[chlorine]], [[bromine]], an...
18: .... During this time, [[fluorine]] was added to the halogen group and [[oxygen]], [[sulfur]], [[selenium]], a...
21: ...1862, but used geological rather than chemical terms and did not include a diagram; as a result, it re...
50: *[http://www.chemsoc.org/viselements/pages/history.html Development ... - Solvent (12764 bytes)
1: ...e [[organic compound]]s and contain [[carbon]] atoms. Solvents usually have a low [[boiling point]] an...
20: ...n top of water. An important exception are many [[halogen]]ated solvents like [[methylene chloride]] or [[c...
24: ...ction between O-H or N-H hydrogens with O or N atoms).
28: ...lvent vapors can also form in supposedly empty drums and cans.
159: <td align="center">[[Dimethyl sulfoxide]] (DMSO)</td>
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