Símbolo | Kr |
Número atómico | 36 |
Grupo | 18 (Gases nobles) |
Período | 4 |
Bloque | p |
Clasificación | Gases nobles |
Apariencia | Colorless gas, exhibiting a whitish glow in a high electric field |
Color | Incoloro |
Número de protones | 36 p+ |
Número de neutrones | 48 n0 |
Número de electrones | 36 e- |
Fase en STP | Gas |
Densidad | 3.749 g/cm3 |
Peso atómico | 83.7982 u |
Punto de fusión | 115.78 K -157.37 °C -251.266 °F |
Punto de ebullición | 119.93 K -153.22 °C -243.796 °F |
Entalpía de vaporización | 9.029 kJ/mol |
Electronegatividad (Escala de Pauling) | 3 |
Afinidad electrónica | -96 kJ/mol |
Estado de oxidación | 0, +1, +2 (rarely more than 0; oxide is unknown) |
Energía de ionización |
|
Descubrimiento y primer aislamiento | William Ramsay, Morris Travers (1898) |
Descubrimiento de kriptón Krypton was discovered in Britain in 1898 by William Ramsay, a Scottish chemist, and Morris Travers, an English chemist, in residue left from evaporating nearly all components of liquid air. Neon was discovered by a similar procedure by the same workers just a few weeks later. William Ramsay was awarded the 1904 Nobel Prize in Chemistry for discovery of a series of noble gases, including krypton. |