In the $α\alpha$ -particle scattering experiment, $α\alpha$ -particles are directed at a thin gold foil.

Which row correctly matches an observation from this experiment with the conclusion it supports?

	Observation	Conclusion
A	A very small fraction of the $α\alpha$ -particles are deflected by more than $90∘90^\circ$ .	The nucleus is extremely small and contains most of the mass of the atom.
B	A very small fraction of the $α\alpha$ -particles are deflected by more than $90∘90^\circ$ .	The atom is a uniform sphere of positive charge with electrons embedded in it.
C	Most of the $α\alpha$ -particles are deflected by more than $90∘90^\circ$ .	The nucleus is extremely small and contains most of the mass of the atom.
D	Most of the $α\alpha$ -particles are deflected by more than $90∘90^\circ$ .	The atom is a uniform sphere of positive charge with electrons embedded in it.

In the $α\alpha$ -particle scattering experiment, $α\alpha$ -particles are directed at a thin gold foil.

Which row correctly matches an observation from this experiment with the conclusion it supports?

	Observation	Conclusion
A	A very small fraction of the $α\alpha$ -particles are deflected by more than $90∘90^\circ$ .	The nucleus is extremely small and contains most of the mass of the atom.
B	A very small fraction of the $α\alpha$ -particles are deflected by more than $90∘90^\circ$ .	The atom is a uniform sphere of positive charge with electrons embedded in it.
C	Most of the $α\alpha$ -particles are deflected by more than $90∘90^\circ$ .	The nucleus is extremely small and contains most of the mass of the atom.
D	Most of the $α\alpha$ -particles are deflected by more than $90∘90^\circ$ .	The atom is a uniform sphere of positive charge with electrons embedded in it.

5.1.1a Structure of the atom and ions

5.1.1a Structure of the atom and ions Questions