20Ca
碱土金属
钙 Ca
Calcium
物态与数值
- 物态
- 固态
- 周期／族
- 4／2
- 相对原子质量
- 40.0784 （不是质量数）
- 原始密度
- 1.55 g/cm3
- 归一化密度
- 1.55 g/cm³
- 来源熔点字段
- 1115.0 K（部分来源实际为三相点，教学前需核对条件）
- 来源沸点字段
- 1757.0 K
部分超重元素属性为预测值，不能当作已审实验值。氢原始气体密度单位与归一化单位不同，均保留展示。
英文来源解释
中文翻译待补。
Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth's crust. The ion Ca2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.
出处、中文名称与原始字段
- 来源位置
- multisubject/elements/raw/PeriodicTableJSON.json#/elements/19
- 原记录摘要
- 05e478cb1192c5bbfad8d9600fd3b4c7902c0966ad5d0408bfcc4d5092424c0d
- boil
- 1757
- melt
- 1115
- name
- Calcium
- xpos
- 2
- ypos
- 4
- block
- s
- group
- 2
- image
- {'url': 'https://upload.wikimedia.org/wikipedia/commons/7/72/Calcium.jpg', 'title': 'Calcium Grains, grain size about 1 mm', 'attribution': 'Jurii, CC BY 3.0 <https://creativecommons.org/licenses/by/3.0>, via Wikimedia Commons, source: https://images-of-elements.com/calcium.php'}
- phase
- Solid
- wxpos
- 2
- wypos
- 4
- number
- 20
- period
- 4
- shells
- [2, 8, 8, 2]
- source
- https://en.wikipedia.org/wiki/Calcium
- symbol
- Ca
- cpk-hex
- 3dff00
- density
- 1.55
- summary
- Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth's crust. The ion Ca2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.
- category
- alkaline earth metal
- named_by
- 未知
- appearance
- 未知
- molar_heat
- 25.929
- atomic_mass
- 40.0784
- atomic_radii
- {'metallic': [197], 'empirical': [180], 'calculated': [194], 'van_der_waals': [231], 'covalent_single': [171], 'covalent_triple': [133]}
- density_unit
- g/cm3
- spectral_img
- https://en.wikipedia.org/wiki/File:Calcium_Spectrum.png
- bohr_model_3d
- https://storage.googleapis.com/search-ar-edu/periodic-table/element_020_calcium/element_020_calcium.glb
- density_g_cm3
- 1.55
- discovered_by
- Humphry Davy
- bohr_model_image
- https://storage.googleapis.com/search-ar-edu/periodic-table/element_020_calcium/element_020_calcium_srp_th.png
- electron_affinity
- 2.37
- ionization_energies
- [589.8, 1145.4, 4912.4, 6491, 8153, 10496, 12270, 14206, 18191, 20385, 57110, 63410, 70110, 78890, 86310, 94000, 104900, 111711, 494850, 527762]
- electron_configuration
- 1s2 2s2 2p6 3s2 3p6 4s2
- electronegativity_pauling
- 1
- electron_configuration_semantic
- [Ar] 4s2