Question

1. Which of the following is NOT part of John Dalton's atomic theory? (1 point)

A. All elements are composed of atoms.
B. All atoms of the same element have the same mass.
C. Atoms contain subatomic particles.
D. A compound contains atoms of more more than one element.

2. Who provided evidence for the existence of a nucleus in an atom? (1 point)

A. John Dalton
B. J. J Thomson
C. Democritus
D. Ernest Rutherford

I think the answers are
1. D
2. D

Answer 1

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Answer 2

2.\(\large \color{Blue}{Ernest~ Rutherford}\)

Answer 3

C and D are correct as far as we understand. For 1. C is correct because Dalton considered matter to be composed of very tiny indivisible particles called atoms which means it can't be further subdivided and thus no sub-atomic particles.
For 2. D is correct, the bombardment of alpha particles on the gold foil showed that few alpha particles deflected at larger angles and few almost bounced back from which Rutherford concluded that there is a heavy portion in the center of atom which is positively charged.
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Answer 4

\(\Huge \color{Blue}{Welcome~To }\) \(\Huge \color{Red}{Open~Study }\)

Answer 5

\(\Huge\color{Blue}{Medal~ }\)