Waste materials, mining and transportation of radioactive fuels, radiation emissions from nuclear sites
I just had this question. The answer is A. a battery
Answer:
Nitrogen
Explanation:
Nitrogen has 5 Valence Electrons.
And its atomic mass is also less than Bismuth.
There are other elements in the 5th row but this one has the lowest atomic mass compared to the others.
I know the answer. It is 2 straight chains. lLOL