Question

Why is mercury in thermometer​

Answer 1

$\huge\bf\blue {Hey\:Mate}$

-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.

@ItsMysteriousGirl ✍