I honestly couldn’t find the word science so I put it under chemistry because my friend thinks that they’re the same but I’m trying I can someone please help me and tell me what goes where I would very appreciate it

The answer is c. 320 g

C. 1s22s22p63s23p43d104s24p5

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.