Multiple Choice
Which of the following best explains why noble gases are so unreactive?
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1. Intro to General Chemistry
Chemical Properties
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Which element is a liquid metal commonly used in thermometers?
A
Aluminum (Al)
B
Mercury (Hg)
C
Sodium (Na)
D
Lead (Pb)
Verified step by step guidance1
Identify the physical state of each element at room temperature (approximately 25°C).
Recall that most metals are solid at room temperature, but mercury (Hg) is unique because it is a liquid metal under these conditions.
Understand that mercury's liquid state at room temperature makes it suitable for use in thermometers, as it expands and contracts uniformly with temperature changes.
Recognize that aluminum (Al), sodium (Na), and lead (Pb) are all solid metals at room temperature and therefore not used as liquid metals in thermometers.
Conclude that mercury (Hg) is the liquid metal commonly used in thermometers due to its physical properties.
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