91Pa
锕系元素
镤 Pa
Protactinium
物态与数值
- 物态
- 固态
- 周期／族
- 7／3
- 相对原子质量
- 231.035882 （不是质量数）
- 原始密度
- 15.37 g/cm3
- 归一化密度
- 15.37 g/cm³
- 来源熔点字段
- 1841.0 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
- 4300.0 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。
Protactinium is a chemical element with symbol Pa and atomic number 91. It is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds where protactinium is usually present in the oxidation state +5, but can also assume +4 and even +2 or +3 states.
出处、中文名称与原始字段
- 来源位置
- multisubject/elements/raw/PeriodicTableJSON.json#/elements/90
- 原记录摘要
- 05e478cb1192c5bbfad8d9600fd3b4c7902c0966ad5d0408bfcc4d5092424c0d
- boil
- 4300
- melt
- 1841
- name
- Protactinium
- xpos
- 5
- ypos
- 10
- block
- f
- group
- 3
- image
- {'url': 'https://upload.wikimedia.org/wikipedia/commons/a/af/Protactinium-233.jpg', 'title': 'This sample of Protactinium-233 (dark circular area in the photo) was photographed in the light from its own radioactive emission (the lighter area) at the National Reactor Testing Station in Idaho.', 'attribution': 'ENERGY.GOV, Public domain, via Wikimedia Commons'}
- phase
- Solid
- wxpos
- 5
- wypos
- 7
- number
- 91
- period
- 7
- shells
- [2, 8, 18, 32, 20, 9, 2]
- source
- https://en.wikipedia.org/wiki/Protactinium
- symbol
- Pa
- cpk-hex
- 00a1ff
- density
- 15.37
- summary
- Protactinium is a chemical element with symbol Pa and atomic number 91. It is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds where protactinium is usually present in the oxidation state +5, but can also assume +4 and even +2 or +3 states.
- category
- actinide
- named_by
- Otto Hahn
- appearance
- bright, silvery metallic luster
- molar_heat
- 未知
- atomic_mass
- 231.035882
- atomic_radii
- {'metallic': [163], 'empirical': [180], 'calculated': None, 'van_der_waals': None, 'covalent_single': [169], 'covalent_triple': [129]}
- density_unit
- g/cm3
- spectral_img
- 未知
- bohr_model_3d
- https://storage.googleapis.com/search-ar-edu/periodic-table/element_091_protactinium/element_091_protactinium.glb
- density_g_cm3
- 15.37
- discovered_by
- William Crookes
- bohr_model_image
- https://storage.googleapis.com/search-ar-edu/periodic-table/element_091_protactinium/element_091_protactinium_srp_th.png
- electron_affinity
- 53.03
- ionization_energies
- [568]
- electron_configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f2 6d1
- electronegativity_pauling
- 1.5
- electron_configuration_semantic
- [Rn] 5f2 6d1 7s2