Multiple Choice
Which of the following elements is a liquid at room temperature (25°C)?
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2. Atoms & Elements
Periodic Table: Phases
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Which of the following elements is a liquid at room temperature (25°C)?
A
Sodium (Na)
B
Bromine (Br)
C
Chlorine (Cl)
D
Mercury (Hg)
Verified step by step guidance1
Understand that room temperature is typically considered to be around 25°C, and the physical state of an element at this temperature depends on its melting and boiling points.
Recall or look up the melting and boiling points of each element to determine their states at 25°C:
- Sodium (Na) has a melting point around 98°C, so at 25°C it is solid.
- Bromine (Br) has a melting point around -7°C and a boiling point around 59°C, so at 25°C it is a liquid.
- Chlorine (Cl) has a melting point around -101°C and a boiling point around -34°C, so at 25°C it is a gas.
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