ទំព័រគំរូ:Infobox boron

Boron
5B
– ↑ B ↓ Al beryllium ← boron → carbon
Boron នៅក្នុងតារាងខួបនៃធាតុគីមី
រូបរាង
black-brown boron (β-rhombohedral)
លក្ខណៈទូទៅ
ឈ្មោះ, និមិត្តសញ្ញា, លេខ	boron, B, 5
Pronunciation	/ˈbɔərɒn/
ក្រុម, ខួប, block	13, 2, p
ទម្ងន់អាតូម	{{{atomic mass}}}
លេខអេឡិចត្រុង	[He] 2s2 2p1 2, 3
Physical properties
Phase	solid
ដង់ស៊ីតេអង្គធាតុរាវ នៅ ចំណុចរលាយ	2.08 g·cm−3
ចំណុចរលាយ	2349 K, 2076 °C, 3769 °F
ចំណុចរំពុះ	4200 K, 3927 °C, 7101 °F
Heat of fusion	50.2 kJ·mol−1
Heat of vaporization	508 kJ·mol−1
Molar heat capacity	11.087 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 2348 2562 2822 3141 3545 4072
Atomic properties
ចំនួនអុកស៊ីតកម្ម	3, 2, 1, −1, −5 ((a mildly acidic oxide))
អេឡិចត្រូនេកាទីវ	2.04 (Pauling scale)
Ionization energies (more)	1st: {{{1st ionization energy}}} kJ·mol−1
	2nd: {{{2nd ionization energy}}} kJ·mol−1
	3rd: {{{3rd ionization energy}}} kJ·mol−1
Atomic radius	90 pm
Covalent radius	84±3 pm
Van der Waals radius	192 pm
Miscellanea
ទម្រង់គ្រីស្តាល	rhombohedral
Magnetic ordering	diamagnetic
Electrical resistivity	(20 °C) ~106Ω·m
Thermal conductivity	27.4 W·m−1·K−1
Thermal expansion	(25 °C) β form: 5–7 µm·m−1·K−1
Speed of sound (thin rod)	(20 °C) 16,200 m·s−1
Mohs hardness	~9.5
CAS registry number	7440-42-8
History
Discovery	Joseph Louis Gay-Lussac and Louis Jacques Thénard (30 June 1808)
First isolation	Humphry Davy (9 July 1808)
Most stable isotopes
Main article: Isotopes of boron
iso NA half-life DM DE (MeV) DP 10B content may be as low as 19.1% and as high as 20.3% in natural samples. 11B is the remainder in such cases.

Element navigation

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iso 5B ibox    wd:Q618

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ឯកសារយោង

ឯកសារយោងទាំងនេះនឹងបង្ហាញក្នុងអត្ថបទនេះ ប៉ុន្តែបញ្ជីនេះបង្ហាញត្រឹមតែលើទំព័រនេះទេ។

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Atomic number 119 and above

When the atomic number is ≥ 119, the miniature periodic table shows an extended version (period 8). See for example {{infobox ununennium}}.

Hydrogen example

Hydrogen
1H
- ↑ H ↓ Li - ← hydrogen → helium
Hydrogen នៅក្នុងតារាងខួបនៃធាតុគីមី
រូបរាង
colorless gas Purple glow in its plasma state Spectral lines of hydrogen
លក្ខណៈទូទៅ
ឈ្មោះ, និមិត្តសញ្ញា, លេខ	hydrogen, H, 1
Pronunciation	/ˈhaɪdrədʒən/ hy-drə-jən
Element category	diatomic nonmetal
ក្រុម, ខួប, block	1, 1, s
ទម្ងន់អាតូម	1.007947(1)
លេខអេឡិចត្រុង	1s1 1
Physical properties
ព័ណ៌	colorless
Phase	gas
ដង់ស៊ីតេ	(0 °C, 101.325 kPa) 0.08988 g/L
ដង់ស៊ីតេអង្គធាតុរាវ នៅ ចំណុចរលាយ	0.07 (0.0763 solid) g·cm−3
ដង់ស៊ីតេអង្គធាតុរាវ នៅ ចំណុចរំពុះ	0.07099 g·cm−3
ចំណុចរលាយ	14.01 K, -259.14 °C, -434.45 °F
ចំណុចរំពុះ	20.28 K, -252.87 °C, -423.17 °F
Triple point	13.8033 K, 7.042 kPa
Critical point	32.97 K, 1.293 MPa
Heat of fusion	(H2) 0.117 kJ·mol−1
Heat of vaporization	(H2) 0.904 kJ·mol−1
Molar heat capacity	(H2) 28.836 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 15 20
Atomic properties
ចំនួនអុកស៊ីតកម្ម	1, -1 (amphoteric oxide)
អេឡិចត្រូនេកាទីវ	2.20 (Pauling scale)
Ionization energies	1st: 1312.0 kJ·mol−1
Covalent radius	31±5 pm
Van der Waals radius	120 pm
Miscellanea
ទម្រង់គ្រីស្តាល	hexagonal
Magnetic ordering	diamagnetic
Thermal conductivity	0.1805 W·m−1·K−1
Speed of sound	(gas, 27 °C) 1310 m·s−1
CAS registry number	1333-74-0
History
Discovery	Henry Cavendish (1766)
Named by	Antoine Lavoisier (1783)
Most stable isotopes
Main article: Isotopes of hydrogen
iso NA half-life DM DE (MeV) DP 1H 99.985% 1H is stable with 0 neutrons 2H 0.015% 2H is stable with 1 neutron 3H trace 12.32 y β− 0.01861 3He

Bare parameters

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• Category:Periodic table infobox templates

ឯកសារយោង

ឯកសារយោងទាំងនេះនឹងបង្ហាញក្នុងអត្ថបទនេះ ប៉ុន្តែបញ្ជីនេះបង្ហាញត្រឹមតែលើទំព័រនេះទេ។

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