Which of the following s-block elements is a liquid at room temperature?

Which of the following s-block elements is a liquid at room temperature?

Step 1: Understand what s-block elements are. They are found in Group 1 and Group 2 of the periodic table.
Step 2: Identify the s-block elements. These include elements like lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Step 3: Know the states of matter at room temperature (about 20-25 degrees Celsius). Most elements are solids, some are gases, and a few are liquids.
Step 4: Check which of the s-block elements are liquids at room temperature. Most s-block elements are solids.
Step 5: Recognize that mercury (Hg) is a liquid at room temperature, but it is not an s-block element; it is a transition metal.
Step 6: Conclude that among the options given, mercury is the only liquid, but it does not belong to the s-block elements.

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