网络斗地主下载

  • <tr id='z75u9'><strong id='z75u9'></strong><small id='z75u9'></small><button id='z75u9'></button><li id='z75u9'><noscript id='z75u9'><big id='z75u9'></big><dt id='z75u9'></dt></noscript></li></tr><ol id='z75u9'><option id='z75u9'><table id='z75u9'><blockquote id='z75u9'><tbody id='z75u9'></tbody></blockquote></table></option></ol><u id='z75u9'></u><kbd id='z75u9'><kbd id='z75u9'></kbd></kbd>

    <code id='z75u9'><strong id='z75u9'></strong></code>

    <fieldset id='z75u9'></fieldset>
          <span id='z75u9'></span>

              <ins id='z75u9'></ins>
              <acronym id='z75u9'><em id='z75u9'></em><td id='z75u9'><div id='z75u9'></div></td></acronym><address id='z75u9'><big id='z75u9'><big id='z75u9'></big><legend id='z75u9'></legend></big></address>

              <i id='z75u9'><div id='z75u9'><ins id='z75u9'></ins></div></i>
              <i id='z75u9'></i>
            1. <dl id='z75u9'></dl>

                1. <form id='6d2lh'></form>
                    <bdo id='6d2lh'><sup id='6d2lh'><div id='6d2lh'><bdo id='6d2lh'></bdo></div></sup></bdo>

                          <dir id='jd9we'><del id='jd9we'><del id='jd9we'></del><pre id='jd9we'><pre id='jd9we'><option id='jd9we'><address id='jd9we'></address><bdo id='jd9we'><tr id='jd9we'><acronym id='jd9we'><pre id='jd9we'></pre></acronym><div id='jd9we'></div></tr></bdo></option></pre><small id='jd9we'><address id='jd9we'><u id='jd9we'><legend id='jd9we'><option id='jd9we'><abbr id='jd9we'></abbr><li id='jd9we'><pre id='jd9we'></pre></li></option></legend><select id='jd9we'></select></u></address></small></pre></del><sup id='jd9we'></sup><blockquote id='jd9we'><dt id='jd9we'></dt></blockquote><blockquote id='jd9we'></blockquote></dir><tt id='jd9we'></tt><u id='jd9we'><tt id='jd9we'><form id='jd9we'></form></tt><td id='jd9we'><dt id='jd9we'></dt></td></u>
                        1. <code id='jd9we'><i id='jd9we'><q id='jd9we'><legend id='jd9we'><pre id='jd9we'><style id='jd9we'><acronym id='jd9we'><i id='jd9we'><form id='jd9we'><option id='jd9we'><center id='jd9we'></center></option></form></i></acronym></style><tt id='jd9we'></tt></pre></legend></q></i></code><center id='jd9we'></center>

                            <dd id='jd9we'></dd>

                              <style id='jd9we'></style><sub id='jd9we'><dfn id='jd9we'><abbr id='jd9we'><big id='jd9we'><bdo id='jd9we'></bdo></big></abbr></dfn></sub>
                              <dir id='jd9we'></dir>
                            1. ▸▸
                              • 🇬🇧 Iodine
                              • 🇨🇳 碘
                              • 🇳🇱 Jood
                              • 🇫🇷 Iode
                              • 🇩🇪 Iod
                              • 🇮🇱 יוד
                              • 🇮🇹 Iodio
                              • 🇯🇵 ヨウ素
                              • 🇵🇹 Iodo
                              • 🇷🇺 Иод
                              • 🇪🇸 Yodo
                              • 🇸🇪 Jod

                              Iodine: the essentials

                              Iodine atoms have 53 electrons and the shell structure is 2.8.18.18.7. The ground state electronic configuration of neutral iodine is [Kr].4d10.5s2.5p5 and the term symbol of iodine is 2P3/2.

                              Iodine: description  

                              Iodine is a bluish-black, lustrous solid. It volatilises at ambient temperatures into a pretty blue-violet gas with an irritating odour.

                              网络斗地主下载It forms compounds with most elements, but is less reactive than the other halogens, which displace it from iodides. Iodine exhibits some metallic-like properties. It dissolves readily in chloroform, carbon tetrachloride, or carbon disulphide to form beautiful purple solutions. It is only slightly soluble in water. Iodine compounds are important in organic chemistry and very useful in medicine and photography. Lack of iodine is the cause of goitre (Derbyshire neck). The deep blue colour with starch solution is characteristic of the free element. It is assimilated by seaweeds from which it may be recovered, and is found in Chilean saltpetre, caliche, old salt brines, and salt wells.

                              iodine

                              Iodine: physical properties

                              More physical properties...

                              Iodine: heat properties

                              More thermochemical properties...

                              Iodine: electronegativities

                              More electronegativity properties...

                              Iodine: orbital properties

                              More orbital properties...

                              Iodine: abundances

                              More geological data...

                              Iodine: crystal structure

                              I crystal structure
                              The solid state structure of iodine is: bcc (body-centred cubic).

                              More crystallographic data...

                              Iodine: biological data

                              In nature, iodine exists as iodide ions, I-, and it is as iodide that it is taken into our bodies. Iodine is an essential component of the human diet and in fact appears to be the heaviest required element in the diet. Iodine compounds are useful in medicine.

                              网络斗地主下载Lack of iodine in the diet is a cause of goitre (Derbyshire neck). This condition is rare now as table salt is dosed with a little iodide.

                              More biological data...

                              Iodine: uses

                              Uses...

                              Iodine: reactions

                              Reactions of iodine as the element with air, water, halogens, acids, and bases where known.

                              View reactions of iodine...

                              Iodine: binary compounds

                              Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of iodine where known.

                              View binary compounds...

                              Iodine: compound properties

                              网络斗地主下载 Bond strengths; lattice energies of iodine halides, hydrides, oxides (where known); and reduction potentials where known.

                              View compound properties...

                              Iodine: history

                              Iodine was discovered by Bernard Courtois in 1811 at France. Origin of name: from the Greek word "iodes" meaning "violet".

                              More history...

                              Iodine: isotopes

                              Isotope abundances of iodine
                              Isotope abundances of iodine with the most intense signal set to 100%.

                              More isotope and NMR data...

                              Iodine: isolation

                              Isolation网络斗地主下载: iodine is available commercially so it is not normally necessary to make it in the laboratory. Iodine occurs in seawater but in much smaller quantities than chloride or bromide. As for bromine, with suitable sources of brine, it is recovered commercially through the treatment of brine with chlorine gas and flushing through with air. In this treatment, iodide is oxidized to iodine by the chlorine gas.

                              2I- + Cl2 → 2Cl- + I2

                              Small amounts of iodine can be made through the reaction of solid sodium iodide, NaI, with concentrated sulphuric acid, H2SO4. The first stage is formation of HI, which is a gas, but under the reaction conditions some of the HI is oxidized by further H2SO4 to form iodine and sulphur dioxide.

                              NaI (s) + H2SO4 (l) → HI (g) + NaHSO4 (s)

                              2HI (g) + H2SO4 (l) → I2 (g) + SO2 (g) + 2H2O (l)

                              在线赌博最新 老虎机大全---网络斗地主下载_欢迎您 疯狂牛牛安卓---网络斗地主下载_欢迎您 娱乐正规网址-Welcome 乐酷棋牌---网络斗地主下载_欢迎您