1.0Baghete Polistiren MARCUhttps://riz.ro/wpproffulhttps://riz.ro/wp/author/profful/rich600338<blockquote class="wp-embedded-content" data-secret="gMF6XDeDxT"><a href="https://riz.ro/wp/2014/01/18/metale-alcalino-pamantoase/">Metale alcalino pamantoase</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://riz.ro/wp/2014/01/18/metale-alcalino-pamantoase/embed/#?secret=gMF6XDeDxT" width="600" height="338" title="„Metale alcalino pamantoase” – Baghete Polistiren MARCU" data-secret="gMF6XDeDxT" 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> Beriliul Magneziul Calciul Strontiul Bariul Radiul Stare naturala Beriliul este un element rar. Cel mai cunoscut mineral de beriliu este un silicat, berilul, Be3Al2Si6O18, care cristalizeaza in prisme hexagonale. Crisoberilul, un oxid mixt de aluminiu si beriliu, BeAl2O4, cristalizeaza in