How are elements in the same group in the periodic table alike? A. They have the same chemical symbol.
B. They have similar chemical properties.
C. They have the same color in nature.
D. They have similar atomic masses.

They have similar chemical properties

I think is D

Explanation:

A is the short name of the element so No

B They are not made equal or similar

C Who cares about the color in nature !

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.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error