Question #2eafd

2 Answers
Mar 1, 2018



this because aluminium has got three valence electrons in the outermost energy level hence has a stronger metallic bond/character than beryllium(Be) which has two valence electrons

Mar 1, 2018



We can compare the metallic character of the two elements with reference to their electronegativity- both characteristics are related to an atom's ability to attract electrons in a compound.

Referring to the Pauling Scale of electronegativity values, we see that aluminum has an electronegativity value of #1.61# whereas beryllium has only #1.57#. Which means that in comparison to beryllium, aluminum is less likely to give up its outer shell electrons in a reaction and is therefore less metallic.

The Pauling Scale Data Page on Wikipedia

Wikipedia contributors. "Electronegativities of the elements (data page)." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, 25 Jan. 2018. Web. 1 Mar. 2018,

Science, Ck12. “Periodic Trends: Metallic and Nonmetallic Character.” CK-12 Foundation, CK-12 Foundation, 30 Aug. 2016,