Correct option is D
The correct answer is (d) Mercury.
Bromine and mercury are the only elements that are liquid at room temperature and standard pressure.
Information Booster:
- Bromine: A non-metal with the atomic number 35 and a brownish-red color
- Mercury: A metal also known as quicksilver, with the atomic number 80. It's used in thermometers, barometers, and other scientific instruments
- Other elements become liquid at or just above room temperature, including: Caesium (Cs), Rubidium (Rb), Francium (Fr), and Gallium (Ga).
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