Question

Which of Rutherford's observations is still true today?

Answer 1

Why, all of them...........

Explanation:

Rutherford's observations were just that, i.e. observations, or experimental results. Our interpretation of these observations MIGHT now be different (I don't know, I am not a `"nucular physicist"`. He was known as an extremely gifted experimentalist, and as far as I know his experimental data are still kosher - of course, they have been revised and expanded by subsequent measurement. And thus Rutherford's observations are still legitimate.