Which element has the greatest (maximum) electronegativity? a) Sn b) Si c) Ge d) C e) Pb
E) Pb
A) Sn
B) Si
C) Ge
D) C

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

more infor would

a lot