There are 118 known elements today and of these and the rest are produced by synthetic methods from nuclear reactions

MILADY COSMETOLOGY CHAPTER 12

List the following gasses

Rn in the right answer

Hope the image of the frequency formula

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.