- Elements in the same group on the periodic table of elements have similar properties
- Chemical reactivity is a property of elements and includes ordered values of reactive / unreactive
- So, elements from the same group on the periodic table are similar in chemical reactivity

Hence, elements from the same group on the periodic table are similar in chemical reactivity
Question
Two elements in the same group on the Periodic Table of the Elements are most similar in their

Context
- Elements in the same group on the periodic table of elements have similar properties 
- Chemical reactivity is a property of elements and includes ordered values of reactive / unreactive