Question

why is mercury used in thermometers?​

Answer 1

Answer:

Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.

Answer 2

Answer:

First reason is that mercury is shinning metal.

Second reason is that it is non sticky so it doesn't stick to glass of thermometer.