Answer:
activation energy would be your answer here
Explanation:
The answer is it tends to be more negative down a group. This is because as you go down the periodic table, the elements have more electron shells in their atoms. This makes the outermost shells less attracted to the nucleus due to their greater distances from the nucleus. Therefore, these shells are less likely to attract electrons (hence lower electron affinity) and are even more likely to lose electrons from their outer electron orbits.
Answer:
In Greek it means sphaira or ball which can be related to the Earth,the atmosphere or biosphere.
