Which group contains only elements which normally exist as diatomic molecules?
A)nitrogen;sulfur,bromine
B)helium;neon,argon
C)nitrogen;oxygen,fluorine
D)hydrogen;lithium,sodium
E)oxygen;phosphorus,germanium

Question

Quizplus · Accepted Answer

Nitrogen and fluorine are both diatomic molecules under normal conditions (N2 and F2). Oxygen, on the other hand, is a diatomic molecule only at very low temperatures and pressures, and can exist as a triatomic molecule (O3) under certain conditions.

Which Group Contains Only Elements Which Normally Exist as Diatomic