Mercury is commonly used as a thermometric fluid rather than water because water wets glass, mercury has greater visibility than water, water expand slowly and then the anomalous behavior of water.
Mercury is a chemical element with symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum.
Melting point: -38.83 °C
Atomic number: 80
Electron configuration: [Xe] 4f145d106s2
Boiling point: 356.7 °C
Electrons per shell: 2,8,18,32,18,2
Atomic mass: 200.59 ± 0.02 u