J.R. S. answered 11/10/18
Ph.D. University Professor with 10+ years Tutoring Experience
Beryllium (Be) is a group 2 metal and as such, it has 2 valence electrons which it would like to give away to become the Be2+ ion. Therefore, it would "like" to bind to another element that is an anion (negative charged ion). These would be group 15, 16 and 17 elements. These elements have 5, 6 and 7 valence electrons, respectively, and so will readily form the 3-, 2- and 1- anions respectively. Beryllium would then form bonds with these elements. Be would "dislike" bonding with all other elements as they are likely to form positive ions and would not bond with another positive ion such as Be2+.