Which of the following correctly describes the reaction of alkaline earth metals with oxygen as we m — s Block Elements Chemistry Question

💡 Solution & Explanation

The reactivity of alkaline earth metals towards oxygen increases down the group. While lighter elements like Be, Mg, and Ca form monoxides ($MO$), the heavier elements like Sr and Ba, due to their lower ionization potential and larger size, can form peroxides ($MO_2$) at appropriate temperatures.