ដែក

ដែក គឺជាធាតុគីមីមួយដែលមាននិមិត្តសញ្ញា Fe

Iron
26Fe
- ↑ Fe ↓ Ru manganese ← iron → cobalt
Iron នៅក្នុងតារាងខួបនៃធាតុគីមី
រូបរាង
lustrous metallic with a grayish tinge Spectral lines of iron
លក្ខណៈទូទៅ
ឈ្មោះ, និមិត្តសញ្ញា, លេខ	iron, Fe, 26
Pronunciation	/ˈaɪ.ərn/
Element category	transition metal
ក្រុម, ខួប, block	8, 4, d
ទម្ងន់អាតូម	55.845(2)
លេខអេឡិចត្រុង	[Ar] 3d6 4s2 2, 8, 14, 2
Physical properties
Phase	solid
ដង់ស៊ីតេ (near r.t.)	7.874 g·cm−3
ដង់ស៊ីតេអង្គធាតុរាវ នៅ ចំណុចរលាយ	6.98 g·cm−3
ចំណុចរលាយ	1811 K, 1538 °C, 2800 °F
ចំណុចរំពុះ	3134 K, 2862 °C, 5182 °F
Heat of fusion	13.81 kJ·mol−1
Heat of vaporization	340 kJ·mol−1
Molar heat capacity	25.10 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1728 1890 2091 2346 2679 3132
Atomic properties
ចំនួនអុកស៊ីតកម្ម	6, 5,[១] 4, 3, 2, 1[២], -1, -2 (amphoteric oxide)
អេឡិចត្រូនេកាទីវ	1.83 (Pauling scale)
Ionization energies (more)	1st: 762.5 kJ·mol−1
	2nd: 1561.9 kJ·mol−1
	3rd: 2957 kJ·mol−1
Atomic radius	126 pm
Covalent radius	132±3 (low spin), 152±6 (high spin) pm
Miscellanea
ទម្រង់គ្រីស្តាល	body-centered cubic a=286.65 pm;
	face-centered cubic between 1185–1667 K
Magnetic ordering	ferromagnetic
	1043 K
Electrical resistivity	(20 °C) 96.1 nΩ·m
Thermal conductivity	80.4 W·m−1·K−1
Thermal expansion	(25 °C) 11.8 µm·m−1·K−1
Speed of sound (thin rod)	(r.t.) (electrolytic) 5120 m·s−1
Young's modulus	211 GPa
Shear modulus	82 GPa
Bulk modulus	170 GPa
Poisson ratio	0.29
Mohs hardness	4
Vickers hardness	608 MPa
Brinell hardness	490 MPa
CAS registry number	7439-89-6
History
Discovery	before 5000 BC
Most stable isotopes
Main article: Isotopes of iron
iso NA half-life DM DE (MeV) DP 54Fe 5.8% >3.1×1022 y β+β+ 0.6800 54Cr 55Fe syn 2.73 y ε 0.231 55Mn 56Fe 91.72% 56Fe is stable with 30 neutrons 57Fe 2.2% 57Fe is stable with 31 neutrons 58Fe 0.28% 58Fe is stable with 32 neutrons 59Fe syn 44.503 d β− 1.565 59Co 60Fe syn 2.6×106 y β− 3.978 60Co
ម ព ក · references