{"id":853,"date":"2013-01-30T10:59:28","date_gmt":"2013-01-30T10:59:28","guid":{"rendered":"http:\/\/news-feday.16mb.com\/?p=853"},"modified":"2016-09-16T06:41:45","modified_gmt":"2016-09-16T06:41:45","slug":"sifat-fisik-dan-kimia-logam-alkali","status":"publish","type":"post","link":"https:\/\/www.syedara.com\/?p=853","title":{"rendered":"Sifat Fisik dan Kimia Logam Alkali"},"content":{"rendered":"<div>\n<p style=\"text-align: justify;\">Berikut ini adalah sifat-sifat logam alkali ditinjau secara fisik mau pun secara kimia:<\/p>\n<ul style=\"text-align: justify;\">\n<li>Unsur logam sangat reaktif dan merupakan reduktor yang\u00a0sangat kuat<\/li>\n<\/ul>\n<ul style=\"text-align: justify;\">\n<li>Berwarna putih keperakan dan berupa logam padat (kecuali\u00a0Cs yang berwujud cair pada siang hari)<\/li>\n<\/ul>\n<ul style=\"text-align: justify;\">\n<li>Titik leleh rendah, lunak dan dapat ditempa<\/li>\n<\/ul>\n<ul style=\"text-align: justify;\">\n<li>Di alam tidak ditemukan dalam keadaan bebas tapi dalam\u00a0bentuk senyawa<\/li>\n<\/ul>\n<ul style=\"text-align: justify;\">\n<li>Keelektronegatifan tergolong rendah<\/li>\n<\/ul>\n<ul style=\"text-align: justify;\">\n<li>Dapat larut dan bereaksi dengan air<\/li>\n<\/ul>\n<ul style=\"text-align: justify;\">\n<li>Dalam satu golongan dari atas ke bawah: titik didih,\u00a0titik lebur, dan energi ionisasinya semakin berkurang, kereaktifan semakin\u00a0bertambah (Fr &gt; Cs &gt; Rb &gt; K &gt; Na &gt; Li)<\/li>\n<\/ul>\n<ul style=\"text-align: justify;\">\n<li>Ionnya bermuatan positif satu<\/li>\n<\/ul>\n<ul style=\"text-align: justify;\">\n<li>Bereaksi hebat dengan air menghasilkan gas hidrogen dan\u00a0hidroksida<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><!-- [if gte mso 9]><xml>\n<o:officedocumentsettings>\n<o:relyonvml><\/o:relyonvml>\n<o:allowpng><\/o:allowpng>\n<\/o:officedocumentsettings>\n<\/xml>< ![endif]--><\/p>\n<table class=\"MsoTableLightGridAccent6\" border=\"1\" width=\"489\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Keterangan <\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\" align=\"center\"><b>Li<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\" align=\"center\"><b>Na<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\" align=\"center\"><b>K<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\" align=\"center\"><b>Rb <\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\" align=\"center\"><b>Cs<\/b><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Nomor atom<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">3<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">11<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">19<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">37<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">55<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Konfigurasi elektron terluar<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">2s?<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">3s?<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">4s?<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">5s?<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">6s?<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Jari-jari atom (pm)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">152<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">186<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">227<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">247<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">265<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Energi ionisasi (kJ\/mol)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">520,2<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">495,8<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">418,8<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">403,0<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">375,7<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Keelektronegatifan <\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0,98<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0,93<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0,82<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">0,82<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">0,79<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Afinitas elektron (kJ\/mol)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">59,63<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">52,867<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">48,384<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">46,884<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">45,505<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Potensial elektroda (E<\/b><b>?<\/b><b>)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">-3,040<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">-2,713<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">-2,924<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">-2,924<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">-2,923<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Titik leleh (K)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">453,54<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">370,81<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">336,65<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">311,89<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">301,4<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Titik didih (K)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">1620<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">1176,8<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">1047<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">961<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">951,4<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Rapatan (g\/cm<\/b><b>?<\/b><b> pada 20<\/b><b>?<\/b><b> C)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0,534<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0, 971<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0,862<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">1,532<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">1,873<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Kekerasan (Mohs)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0,6<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0,5<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">0,4<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">0,3<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">0,2<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Warna nyala<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">Merah tua<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">Kuning<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">Ungu<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">Merah biru<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">Biru<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"252\">\n<p class=\"MsoNormal\"><b>Daya hantar listrik (<\/b><b>pada <\/b><b> skala relatif terhadap perak 100)<\/b><\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">17,1<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">33,2<\/p>\n<\/td>\n<td valign=\"top\" width=\"84\">\n<p class=\"MsoNormal\">22,0<\/p>\n<\/td>\n<td valign=\"top\" width=\"90\">\n<p class=\"MsoNormal\">12,4<\/p>\n<\/td>\n<td valign=\"top\" width=\"78\">\n<p class=\"MsoNormal\">7,76<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Berikut ini adalah sifat-sifat logam alkali ditinjau secara fisik mau pun secara kimia: Unsur logam sangat reaktif dan merupakan reduktor yang\u00a0sangat kuat Berwarna putih keperakan dan berupa logam padat (kecuali\u00a0Cs yang berwujud cair pada siang hari) Titik leleh rendah, lunak dan dapat ditempa Di alam tidak ditemukan dalam keadaan bebas tapi dalam\u00a0bentuk senyawa Keelektronegatifan tergolong&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1281,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[285],"tags":[17,413,414,151],"class_list":["post-853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-artikel","tag-alkali","tag-kimia","tag-logam","tag-sifat"],"_links":{"self":[{"href":"https:\/\/www.syedara.com\/index.php?rest_route=\/wp\/v2\/posts\/853","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.syedara.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.syedara.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.syedara.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.syedara.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=853"}],"version-history":[{"count":0,"href":"https:\/\/www.syedara.com\/index.php?rest_route=\/wp\/v2\/posts\/853\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.syedara.com\/index.php?rest_route=\/wp\/v2\/media\/1281"}],"wp:attachment":[{"href":"https:\/\/www.syedara.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=853"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.syedara.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=853"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.syedara.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}