Why do you think different groups behave differently? A number of protons
B number of neutrons
C number of electrons
D number of valence electrons

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

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.

explanation:

0.07 g/cm³

1.37 g/cm³