Which of the following is not an alkali metal?

Which of the following is not an alkali metal?

Step 1: Understand what alkali metals are. Alkali metals are elements found in Group 1 of the periodic table.
Step 2: Identify the alkali metals. The alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Step 3: Know what alkaline earth metals are. Alkaline earth metals are found in Group 2 of the periodic table.
Step 4: Identify the alkaline earth metals. The alkaline earth metals include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Step 5: Compare the elements in the question. If the element is in Group 1, it is an alkali metal. If it is in Group 2, it is not.
Step 6: Determine which element is not an alkali metal. In this case, calcium (Ca) is in Group 2, so it is not an alkali metal.

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