All noble gas molecules are I. Monoatomic II. Diatomic III. Triatomic IV. Both I and II
Option 1. Except for hydrogen, the elements that occur naturally as gases are on the right side of the periodic table. Of these, all the noble gases (group 18) are monatomic gases, whereas the other gaseous elements are diatomic molecules (H2, N2, O2, F2, and Cl2).
