Which element has the lowest ionization energy?
a. argon (ar)
b. bromine (br)
c. cesium (cs)
d. nickel (ni)

C the answer is cesium, study's show that it has the lowest ionization out of all elements. Hope this helped!

C. Cesium because ionization energy increases as you move from left to right across a period and from down up a column of the periodic table, making a diagonal pattern from the bottom left corner to the top right of the periodic table.

Ibelieve y y even though i've only taken chemistry for one year

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.