Question

12 Which gas is monatomic at room temperature and

pressure?
(1) nitrogen
(2) neon
(3) fluorine
(4) chlorine

Answer 1

Step-by-step explanation:

Monatomic elements are simply elements that are stable as single atoms (mona/mono means one!)

Which gas has only one atom?

Answer 2

Only noble gases are monatomic in these conditions, so your answer would be neon