Which region of the periodic table has the most elements. list them in order

periodic table`~

Explanation:

period:  a row of the periodic table.  Properties of the elements are periodic, meaning that they repeat after a specific interval.  Elements in the same period have their highest energy electrons in the same principal energy level.

group (family):  a column of the periodic table.  Elements in the same group have the same number of valence electrons, and therefore have similar chemical and physical properties.

hey your not cool]      

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.