\(H_2\)
To determine which among the given options has the least coefficient of thermal conductivity, let's first understand the concept of thermal conductivity.
Thermal Conductivity: It is a property of a material that indicates its ability to conduct heat. Materials with high thermal conductivity transfer heat more efficiently than those with low thermal conductivity.
The options given are:
Thermal Conductivity Values:
From these values, it is clear that \(H_2\) (Hydrogen) has the least coefficient of thermal conductivity among the given options.
Conclusion: The correct answer is \(H_2\) because it has the lowest thermal conductivity, meaning it is the least effective at conducting heat compared to the other substances listed.
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