ngoi-kôn lustrous metallic with a grayish tingeSpectral lines of iron Kî-pún sin-sit Miàng,fù-ho Thiet, Fe Yîn-ngî iron ngoi-hìn lustrous metallic with a grayish tinge Thiet chhaichû-khì-péu ke vi-chi ngièn-chṳ́ sì-sú 26 ngièn-chṳ́-liòng (±) 55.845(2)[ 1] ngièn-su lui-phe̍t ko-thu kîm-su̍k Chhu̍k ,fûn-khî 8 chhu̍k d-block chû-khì period 4 thien-chṳ́ phài-lie̍t [Ar ] 3d6 4s2 per shell 2, 8, 14, 2 vu̍t-lî sin-chṳt Siông ku-thí yùng-tiám 1811 K (1538 °C, 2800 °F) pui-tiám 3134 K (2862 °C, 5182 °F) Me̍t-thu near Sit-vûn 7.874 g·cm−3 6.98 g·cm−3 Yùng-fa-ngie̍t 13.81 kJ·mol−1 Chîn-fat-ngie̍t 340 kJ·mol−1 Ngie̍t-yùng-liong 25.10 J·mol−1 −1 chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 1728 1890 2091 2346 2679 3132
Ngièn-chṳ́ sin-chṳt Yông-fa-su −4, −2, −1, +1,[ 2] +2 ,+3 , +4, +5,[ 3] +6 (anamphoteric oxide)Thien-fu-sin Pauling scale: 1.83 Thien-lì-nèn 1st: 762.5 kJ·mol−1 −1 −1 more ) Ngièn-chṳ́ pan-kang empirical: 126 pm Khiung-ka pan-kang Low spin: 132±3 pm Miscellanea Chîn-thí keu-chho body-centered cubic (bcc)a =286.65 pm Chîn-thí keu-chho face-centered cubic (fcc) Sâng-suk thin rod 5120 m·s−1 r.t.) (electrolytic) Ngie̍t-phàng-chong 11.8 µm·m−1 −1 Ngie̍t-chhòn-thô-li̍t 80.4 W·m−1 −1 Thien-chú-li̍t 96.1 nΩ·m (at 20 °C) Curie vûn-thu 1043 K Chhṳ̀-sin ferromagnetic 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 200–1180 MPa CAS Registry Number 7439-89-6 Le̍k-sú Fat-hien before5000 BC Chui vún-thin ke thùng-vi-su Chú vùn-chông:Thiet ke thùng-vi-su iso NA half-life DM DE (MeV ) DP 54 Fe5.8% >3.1×1022 y εε 0.668 54 Cr55 Fesyn 2.73 y ε 0.231 55 Mn56 Fe91.72% 56 Fe isstable with 30neutron s57 Fe2.2% 57 Fe is stable with 31 neutrons58 Fe0.28% 58 Fe is stable with 32 neutrons59 Fesyn 44.503 d β− 1.565 59 Co60 Fesyn 2.6×106 y β− 3.978 60 Co
Decay modes in parentheses are predicted, but have not yet been observed 
