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. oxygen (o) gallium (ga) chlorine (cl) zinc (zn) aluminum (al) boron (b)

Explanation:

Group 13 (boron group) elements include boron (B), aluminum (Al), gallium (Ga), indium (In), thallium (Tl), etc. To find the one with the least atomic mass, compare the atomic masses of the Group 13 options here: Boron has an atomic mass of ~10.81, Aluminum ~26.98, Gallium ~69.72. Oxygen and Chlorine are not Group 13 elements, Zinc is in Group 12.

Answer:

Boron (B)