Give an example of a metal which

(i) Metal that is a liquid at room temperature:

» Example: Mercury (Hg)
» State at Room Temperature: Mercury is the only metal that is a liquid at standard room temperature.

(ii) Metal that can be easily cut with a knife:

» Example: Sodium (Na)
» Explanation: Sodium is a soft metal that is highly reactive with air and moisture. It is so soft that it can be easily cut with a knife.

(iii) Metal that is the best conductor of heat:

» Example: Silver (Ag)
» Explanation: Silver is known for its excellent thermal conductivity, making it one of the best conductors of heat among all elements.

(iv) Metal that is a poor conductor of heat:

» Example: Bismuth (Bi)
» Explanation: Bismuth is a metal that is a poor conductor of heat compared to many other metals. It has a relatively low thermal conductivity.
It’s important to note that the properties of metals can vary, and the examples provided here are generalizations. For instance, while silver is an excellent conductor of heat, copper and aluminum are also commonly used for their high thermal conductivity. Similarly, the ease with which a metal can be cut with a knife depends on its specific properties, and some metals like sodium are known for their softness and reactivity.