Step-by-step explanation:
Atomic number of Radium is 88 and it is the last element or member of alkaline earth metal group.
Also, we know that on moving down the group there is an increase in reactivity of elements.
Therefore, we can conclude that another property of radium that you can deduce from the information given in the periodic table is that Radium is highly reactive in nature.
Also it is known that radium is radioactive in nature this also proves that radium is a reactive element.