I am an alkaline earth metal in period 2 of the periodic table. Who am I?
The correct answer is Ca, which stands for Calcium. Calcium is an alkaline earth metal located in period 2 of the periodic table. It has the atomic number 20 and is known for its role in building strong bones and teeth. Additionally, Calcium is essential for various biological functions in the human body, including muscle contractions and nerve function.
Calcium is a reactive metal that forms compounds with other elements, such as Calcium carbonate (CaCO3) found in limestone and Calcium hydroxide [Ca(OH)2] commonly known as lime water.
In contrast, the other options provided in the question (OB, O Be, Li) do not match the description of being an alkaline earth metal in period 2 of the periodic table.
