Question

1.) The modern atomic theory has been updated over the years as new observations of the atom have been made. What do these changes say about the strength of the modern atomic theory?
A. The changes make the theory weaker because they demonstrate that the scientific community can't agree on the properties of atoms.
B. The changes make the theory weaker because they demonstrate that the original atomic theory was flawed, so all resulting theories are also flawed.
C. The changes make the theory stronger because it has been tested and edited multiple times, making it more durable.
D. The changes make the theory stronger because each time the theory is changed, it becomes more popular.


2.) In Rutherford's famous experiment, he shot heavy, fast moving, positive alpha particles at a thin gold foil. Based on Thomson's plum pudding model of the atom, what did Rutherford expect to happen, and why?

A. All the alpha particles would be deflected by the foil because of the even distribution of mass and charge throughout the atom.
B. All the alpha particles would pass straight through the foil because of the even distribution of mass and charge throughout the atom.
C. Most of the alpha particles would become embedded in the foil because they are attracted to the negative electrons in the atom.
D. Some of the alpha particles would be deflected and some would pass through, because of the negative charge of the electron cloud.

Answer 1

1.) The modern atomic theory has been updated over the years..

the correct option is:

C. The changes make the theory stronger because it has been tested and edited multiple times, making it more durable.        

 

2. In Rutherfords experiment,Based on Thomson's plum pudding model of the atom, what did Rutherford expect to happen;

A. All the alpha particles would be deflected by the foil because of the even distribution of mass and charge throughout the atom.

According to Thomson's plum pudding model of the atom the positive and negative charges are evenly distributed.