87Fr
碱金属
钫 Fr
Francium
物态与数值
- 物态
- 固态
- 周期／族
- 7／1
- 相对原子质量
- 223.0 （不是质量数）
- 原始密度
- 1.87 g/cm3
- 归一化密度
- 1.87 g/cm³
- 来源熔点字段
- 300.0 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
- 950.0 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。
Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium and actinium K. It is the second-least electronegative element, behind only caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon.
出处、中文名称与原始字段
- 来源位置
- multisubject/elements/raw/PeriodicTableJSON.json#/elements/86
- 原记录摘要
- 05e478cb1192c5bbfad8d9600fd3b4c7902c0966ad5d0408bfcc4d5092424c0d
- boil
- 950
- melt
- 300
- name
- Francium
- xpos
- 1
- ypos
- 7
- block
- s
- group
- 1
- image
- {'url': 'https://images-of-elements.com/francium.jpg', 'title': 'This is only an illustration, not francium itself.', 'attribution': 'Chemical ELements A Virtual Museum, CC BY 3.0 <https://creativecommons.org/licenses/by/3.0> source: https://images-of-elements.com/francium.jpg'}
- phase
- Solid
- wxpos
- 1
- wypos
- 7
- number
- 87
- period
- 7
- shells
- [2, 8, 18, 32, 18, 8, 1]
- source
- https://en.wikipedia.org/wiki/Francium
- symbol
- Fr
- cpk-hex
- 420066
- density
- 1.87
- summary
- Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium and actinium K. It is the second-least electronegative element, behind only caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon.
- category
- alkali metal
- named_by
- 未知
- appearance
- 未知
- molar_heat
- 未知
- atomic_mass
- 223
- atomic_radii
- {'metallic': None, 'empirical': None, 'calculated': None, 'van_der_waals': [348], 'covalent_single': None, 'covalent_triple': None}
- density_unit
- g/cm3
- spectral_img
- 未知
- bohr_model_3d
- https://storage.googleapis.com/search-ar-edu/periodic-table/element_087_francium/element_087_francium.glb
- density_g_cm3
- 1.87
- discovered_by
- Marguerite Perey
- bohr_model_image
- https://storage.googleapis.com/search-ar-edu/periodic-table/element_087_francium/element_087_francium_srp_th.png
- electron_affinity
- 46.89
- ionization_energies
- [380]
- electron_configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s1
- electronegativity_pauling
- 0.79
- electron_configuration_semantic
- [Rn] 7s1