Question

Question #2eafd

Answer 1

aluminium(Al)

Explanation:

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

Answer 2

Beryllium.

Explanation:

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.

References:
Wikipedia contributors. "Electronegativities of the elements (data page)." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, 25 Jan. 2018. Web. 1 Mar. 2018, https://en.wikipedia.org/wiki/Electronegativities_of_the_elements_(data_page)

Science, Ck12. “Periodic Trends: Metallic and Nonmetallic Character.” CK-12 Foundation, CK-12 Foundation, 30 Aug. 2016, www.ck12.org/c/chemistry/periodic-trends%3A-metallic-and-nonmetallic-character/lesson/Metallic-and-Non-metallic-Character-CHEM/.