Why has the model of the atom changed over time?

A.
The model of the atom changed as scientists made more accurate observations.

B.
All models of the atom created by scientists are too simple.

C.
The model of the atom changed over time because the atoms changed composition.

D.
All atoms are unstable and are continuously changing.

Question

Why has the model of the atom changed over time?		
  

 
 A.
The model of the atom changed as scientists made more accurate observations.
 
 B.
All models of the atom created by scientists are too simple.
 
 C.
The model of the atom changed over time because the atoms changed composition.
 
 D.
All atoms are unstable and are continuously changing.

anonymous_user · Answer

http://static.k12.com/calms_media/media/934000_934500/934308/2/c0d91b1ec78e8ce1fb2514705bb4dbccf60c33c3/MS2_PHY_01_09_Q18.jpg

anonymous_user · Answer

I believe that it's A.

anonymous · Answer

Wow, what a big question !
I agree with you, i think the answer is A, but the story behind that is the story of physics in the first decades of the twentieth century and more besides !

anonymous · Answer

The answer is definitely A