Question

i am a noble gas. you wont find a member in my family that is lighter than me. who am i? view periodic table tap on an option below to select or deselect an answer. scandium (sc) fluorine (f) hydrogen (h) helium (he) beryllium (be) boron (b) oxygen (o) radon (rn) lithium (li)

Explanation:

First, identify noble gases from the options: only Helium (He) and Radon (Rn) are noble gases. Next, compare their atomic masses: Helium has the lowest atomic mass among all noble gases, meaning no noble gas is lighter than it. Radon is a heavy noble gas, so there are lighter noble gases than it.

Answer:

Helium (He)