Which word or group of words is represented by the word "period”in the term periodic table?

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation:

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.