In rutherford's gold foil experiments, some alpha particles were deflected from their original paths but most passed through the foil with no deflection. which statement about gold atoms is supported by these experimental observations

It shows that gold (all) atoms are made of mostly empty space. The alpha particles go right through because they hit nothing in the atoms which showed Rutherford that atoms are mostly empty space.

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.