Question

section iii: closed constructed response and critical thinking: read each question carefully and completely. answer the question in the space provided. please follow all directions!

1. list the names of the noble gases. circle the name of the noble gas with the smallest mass.

Explanation:

Step1: Recall noble gases

Noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn).

Step2: Compare molar masses

Molar mass of He is about $4\ g/mol$, Ne is about $20.18\ g/mol$, Ar is about $39.95\ g/mol$, Kr is about $83.80\ g/mol$, Xe is about $131.29\ g/mol$, Rn is about $222\ g/mol$.

Answer:

Noble gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn). The noble gas with the smallest mass is helium (He).