Element M reacts with oxygen to form an oxide with the formula M₂O.When M₂O is dissolved in water,the resulting solution is basic.Element M could be ________. A)calcium B)bromine C)oxygen D)carbon E)nitrogen

Question

Quizplus · Accepted Answer

The fact that the oxide M₂O forms a basic solution when dissolved in water suggests that it contains a metal that can form hydroxide ions in solution. Out of the given options, only calcium is a metal that can form a hydroxide that would result in a basic solution. Additionally, the formula of the oxide M₂O suggests that element M has a 2+ charge, which is consistent with the charge on calcium ions (Ca2+).

Element M Reacts with Oxygen to Form an Oxide with the Formula