Mical
Use the periodic table to identify the name or
atomic number for each element below. (Give the
name, not the chemical symbol, for each
element.)
hafnium: atomic number
atomic number 15
atomic number 45
osmium: atomic number
magnesium: atomic number

pop pop pop on a opp

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.

the answer would be a