Elohopea

Kemiallinen merkki: Hg
Järjestysluku: 80
Kategoria: siirtymämetallit
Ryhmä: 12
Jakso: 6
Lohko: d
Moolimassa: 200,59 g/mol
Elektronia kuorilla: 2, 8, 18, 32, 18, 2
CAS-numero: 7439-97-6
Olomuoto: neste
Tiheys: 13,534 kg/l (lähellä huoneenlämpöä)
Sulamispiste: 234,32 K (-38,83 °C, -37,89 °F)
Kiehumispiste: 629,88 K (356,73 °C, 674,11 °F)
Kiderakenne: rhombohedral
Hapetusluvut: 1, 2
Elektronegatiivisuus: 2,00 (Pauling-asteikko)
Nimen alkuperä: Mercury
Nimen tarkoitus: the Roman god known for speed and mobility
Faktoja:
- the symbol Hg comes from hydrargyrum, a Latinized form of the Greek word hydrargyros, which is a compound word meaning 'water' and 'silver' since it is liquid, like water, and yet has a silvery metallic sheen
- alchemists thought of mercury as the First Matter from which all metals were formed - they believed that different metals could be produced by varying the quality and quantity of sulfur contained within the mercury
- heavy, silvery d-block metal, mercury is one of six elements that are liquid at or near room temperature and pressure, the others being caesium, francium, gallium, bromine, and rubidium
- is the only metal liquid at standard conditions for temperature and pressure, with a melting point of -38,83 C
- occurs in deposits throughout the world as cinnabar (mercuric sulfide), source of the red pigment vermilion
- is used in thermometers, barometers, manometers, sphygmomanometers, float valves, and other scientific apparatus
- mercury and most of its compounds are extremely toxic and are generally handled with care
- has been used in dental amalgams