Question

Which has is heavier than air (A)hydrogen,(B) oxygen,(C) nitrogen,(D)carbon monoxide​

Answer 1

Explanation:

Since Nitrogen is number 15 on the periodic table and Oxygen is 16, Oxygen or any gas higher on the periodic table would be heavier than air.

Answer 2

Answer:

nitrogen

Explanation:

to me i can see that nitrogen is heavier because it has large percentage composition