Which of the following is not an alkaline earth metal? (2020)

Which of the following is not an alkaline earth metal? (2020)

Step 1: Understand what alkaline earth metals are. They are a group of elements in the periodic table that are found in Group 2.
Step 2: Identify the alkaline earth metals. The alkaline earth metals include Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).
Step 3: Look at the options given in the question. We need to find which one is not in the list of alkaline earth metals.
Step 4: Check the element Aluminum (Al). It is not in the list of alkaline earth metals.
Step 5: Conclude that Aluminum (Al) is not an alkaline earth metal; it belongs to a different category called post-transition metals.

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