[El-errata] ELSA-2013-1645 Important: Oracle Linux 6 Kernel update Errata Announcements for Oracle Linux el-errata at oss.oracle.com Tue Nov 26 06:40:04 PST 2013 ...
Diberyllium is thought to be non-existant. This website explains how diberyllium cannot exist in brief and simple language. According to it: A simple MO diagram explains why $\ce{Be2}$ must be indefinitely unstable.