With two questions about radium
1. what is radium position on the periodic table including a list of other elements that have similiar properties
2. five compounds that radium can form (and identify if each compound is naturally occuring, human made, or both)

Radium is an alkali earth metal so is in group ii and shares traits with magnesium, calcium, barium and strontium.

raso4
ra(oh)2
rabr2
ra3n2
racl2
all of these compounds are naturally occurring and can also be synthesised by humans.

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.