Which one of the following is NOT a property of radon?
A) unreactive
B) tasteless
C) odorless
D) nonradioactive
Question 2
The two principal sources of acid rain are ________ emissions from power plants and ________ emissions from automobiles and power plants.
A) sulfur monoxide; ozone
B) ozone; nitrogen monoxide
C) carbon dioxide; nitrogen monoxide
D) sulfur dioxide; nitrogen monoxide