Question

of all the group 13 metals, i am the one with the least mass. who am i? view periodic table tap on an option below to select or deselect an answer. zinc (zn) aluminum (al) fluorine (f) thallium (tl) chlorine (cl) gallium (ga) boron (b) oxygen (o)

Explanation:

First, identify Group 13 elements from the options: Boron (B), Aluminum (Al), Gallium (Ga), Thallium (Tl). Next, exclude non-metals (Boron is a metalloid) to focus on Group 13 metals: Al, Ga, Tl. Then compare their atomic masses: Aluminum has an atomic mass of ~26.98 u, Gallium ~69.72 u, Thallium ~204.38 u. Aluminum has the lowest atomic mass among these Group 13 metals.

Answer:

B. Aluminum (Al)