Larned B. Asprey | Britannica

Larned B. Asprey

Contributor

BIOGRAPHY

Staff Member, Los Alamos National Laboratory, New Mexico, 1949–86. Author of numerous papers on the actinide, rare-earth, transuranium, and halogen elements.

Primary Contributions (1)

A color-coded periodic table of the elements displays each element's symbol and atomic number, with categories such as alkali metals, noble gases, halogens, transition metals, and actinoid elements distinguished by different background colors.

actinoid element

Actinoid element, any of a series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103). As a group, they are significant largely because of their radioactivity. Although several members of the group, including uranium (the most familiar),…