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Group → 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18; ↓ Period 1: H 2 20.271 K (−252.879 °C) He 4.222 K (−268.928 °C) 2: Li 1603 K (1330 °C) Be 2742 K ...
The alkaline earth metals are all silver-colored and soft, and have relatively low densities, melting points, and boiling points. In chemical terms, all of the alkaline earth metals react with the halogens to form the alkaline earth metal halides , all of which are ionic crystalline compounds (except for beryllium chloride , beryllium bromide ...
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Magnesium has the lowest melting (923 K (650 °C)) and the lowest boiling point (1,363 K (1,090 °C)) of all the alkaline earth metals. ... a similar group 2 metal ...
Its melting point is either 700 °C (1,292 °F) or 960 °C (1,760 °F) [a] and its boiling point is 1,737 °C (3,159 °F); however, this is not well established. [6] Both of these values are slightly lower than those of barium, confirming periodic trends down the group 2 elements. [7]
It is the softest of the commonly recognised metalloids. Tellurium reacts with boiling water, or when freshly precipitated even at 50 °C, to give the dioxide and hydrogen: Te + 2 H 2 O → TeO 2 + 2 H 2. It has a melting point of 450 °C and a boiling point of 988 °C. Tellurium has a polyatomic (CN 2) hexagonal crystalline structure.
Water boiling at 99.3 °C (210.8 °F) at 215 m (705 ft) elevation. The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid [1] [2] and the liquid changes into a vapor.
[9]: 2–3 Reactions with water and alcohols are also exothermic and release hydrogen gas: [9]: 3 Ba + 2 ROH → Ba(OR) 2 + H 2 ↑ (R is an alkyl group or a hydrogen atom) Barium reacts with ammonia to form the electride [Ba(NH 3) 6](e-) 2, which near room temperature gives the amide Ba(NH 2) 2. [11] The metal is readily attacked by acids.