Modern inorganic chemistry

256 GROUP V (c) Give two properties which are characteristic of odd-electron molecules. (d) Give the name and formula of a compo ...

10 Group VI (Oxygen, sulphur, selenium, tellurium, polonium) The elements in this group have six electrons in their outer quantu ...

M (^0100) TiblelU SELECTED PROPERTY OF THE ELEMENTS Element n 0 s Se Tc Po tome OwlerA. MOM* , Mm t i , mm of /v X,_ mm mm , , ] ...

GROUP VI 259 H \ C 'V JO, O H C 2 H 5 X or a double bond, for example CH 3 _ \ ^° O=C=O, C H The covalently bonded oxygen atom s ...

260 GROUP VI THE ELEMENTS: OCCURRENCE AND EXTRACTION OXYGEN Oxygen occurs free in the atmosphere (21% by volume. 23% by weight). ...

GROUP VI 261 SULPHUR Large deposits of free sulphur occur in America, Sicily and Japan. Combined sulphur occurs as sulphides, fo ...

262 GROUP V! SELENIUM AND TELLURIUM Selenium and tellurium occur naturally in sulphide ores, usually as an impurity in the sulph ...

GROUP V! 263 absorption of this light in the process prevents it from reaching the earth where it would destroy all living matte ...

264 GROUP VI At room temperature ozone is a slightly blue diamagnetic gas which condenses to a deep blue liquid. It has a charac ...

GROUP VI 265 SULPHUR The structures of sulphur in solid, liquid and gaseous phases are complicated. Rhombic sulphur is the solid ...

266 GROUP VI which almost certainly contain Se 8 ring structures. Selenium, how- ever, also has a grey allotrope which is metall ...

GROUP VI 267 This is a modification of the process originally devised by Deacon; further reference is made on p. 317. Sulphur, s ...

268 GROUP VI REACTIONS WITH ELEMENTS Oxygen is a very reactive element and many metals and non-metals burn in it to give oxide ...

GROUPVI 269 COMPOUNDS OF GROUP VI ELEMENTS HYDRIDES All Group VI elements form a hydride H 2 X. With the notable excep- tion of ...

270 GROUPVI oxygen atom of each water molecule is surrounded by four hydrogen atoms arranged approximately tetrahedrally, two (i ...

GROUP VI 271 CHEMICAL PROPERTIES As expected from the enthalpy of formation, water is thermally very stable but when steam is he ...

272 GROUP VI HYDROLYSIS The term hydrolysis is used widely to mean (a) the direct reaction of water with a substance, for exampl ...

GROUP VI 273 (b) sodium can be melted in dry chlorine without reaction; in the presence of a trace of moisture, violent reaction ...

274 GROUP VI soft water has the disadvantage that it attacks lead piping to give the hydroxide, Pb(OH) 2 , which is slightly sol ...

GROUP VI 275 sodium ions. If we shake up the solid ion-exchanger with hard water, the sodium ions are replaced, i.e. exchanged, ...