How did Millikan deduce that the atom was divisible?

What subatomic particle was the cathode ray particle discovered to be?

Why did Millikan reverse the charges of the plates in his oil drop apparatus?

Is it possible to calculate the mass of one of these particles only knowing the angle of deflection?

Would the angle of deflection of the charged particles be bigger or smaller if they had more mass?

Can electricity pass through nothing?

Why is the shell model a good graphical depiction of an atom?

What does the probability cloud model describe?

Which models describe what atoms actually look like?

What is the importance of developing a good conceptual model of an atom?