1.0Baghete Polistiren MARCUhttps://riz.ro/wpproffulhttps://riz.ro/wp/author/profful/rich600338<blockquote class="wp-embedded-content" data-secret="Qh22kEOKzE"><a href="https://riz.ro/wp/2014/01/18/bismut/">Bismut</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://riz.ro/wp/2014/01/18/bismut/embed/#?secret=Qh22kEOKzE" width="600" height="338" title="„Bismut” – Baghete Polistiren MARCU" data-secret="Qh22kEOKzE" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://riz.ro/wp/wp-includes/js/wp-embed.min.js /* ]]> */ </script> Stare naturala. Obtinere Bismutul este un element relativ putin raspandit. Principalul mineral de bismut este sulfura, bismutina, Bi2S2. Intocmai ca si antimoniul, bismutul se obtine usor din oxidul sau prin reducere cu carbune. Sulfura se prajeste intai la aer, spre