Zirconium
Chemical element with atomic number 40Àdàkọ:SHORTDESC:Chemical element with atomic number 40
Zirconium, 40 Zirconium Pípè / z ər ˈ k oʊ n i ə m / (zər-KOH -nee-əm Ìhànsójú silvery white Ìwúwo átọ̀mù A r, std (Zr) 91.224(2) [1] Zirconium ní orí tábìlì àyè
Nọ́mbà átọ̀mù (Z ) 40 Ẹgbẹ́ group 4 Àyè àyè 5 Àdìpọ̀ Àdìpọ̀-d Ẹ̀ka ẹ́límẹ́ntì Transition metalÌtò ẹ̀lẹ́ktrọ́nù [Kr ] 4d2 5s2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 10, 2 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 2128 K (1855 °C, 3371 °F) Ígbà ìhó 4682 K (4409 °C, 7968 °F) Kíki (near r.t. ) 6.52 g/cm3 when liquid (at m.p. ) 5.8 g/cm3 Heat of fusion 14 kJ/mol Heat of 573 kJ/mol Molar heat capacity 25.36 J/(mol·K) pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
2639
2891
3197
3575
4053
4678
Atomic properties Oxidation states −2, +1,[2] +4 Electronegativity Pauling scale: 1.33 Atomic radius empirical: 160 pm Covalent radius 175±7 pm Color lines in a spectral range Spectral lines of zirconium Other properties Natural occurrence primordial Crystal structure hexagonal close-packed (hcp) Speed of sound thin rod 3800 m/s (at 20 °C) Thermal expansion 5.7 µm/(m·K) (at 25 °C) Thermal conductivity 22.6 W/(m·K) Electrical resistivity 421 n Ω·m (at 20 °C) Magnetic ordering paramagnetic[3] Young's modulus 88 GPa Shear modulus 33 GPa Bulk modulus 91.1 GPa Poisson ratio 0.34 Mohs hardness 5.0 Vickers hardness 903 MPa Brinell hardness 650 MPa CAS Number 7440-67-7 Main isotopes of zirconium
Isotope
Abundance
Half-life (t 1/2 )
Decay mode
Product
88 Zr
syn
83.4 d
ε
-
88 Y
γ
0.392D
89 Zr
syn
78.4 h
ε
-
89 Y
β+
0.902
89 Y
γ
0.909D
90 Zr
51.45%
90 Zr is stable with 50 neutrons
91 Zr
11.22%
91 Zr is stable with 51 neutrons
92 Zr
17.15%
92 Zr is stable with 52 neutrons
93 Zr
trace
1.53×106 y
β−
0.060
93 Nb
94 Zr
17.38%
1.1×1017 y
β−β−
-
94 Mo
96 Zr
2.8%
2.0×1019 y[4]
β−β−
3.348
96 Mo
Àdàkọ:Category-inline
Zirconium (pípè /zərˈkoʊniəm/ zər-KOH -ni-əm ipilese elegbogi pelu ami-idamo Zr ati nomba atomu 40.
Itokasi
↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305 . ↑ "Zirconium: zirconium(I) fluoride compound data" . OpenMOPAC.net. Retrieved 2007-12-10 . ↑ Magnetic susceptibility of the elements and inorganic compounds , in Handbook of Chemistry and Physics 81st edition, CRC press. ↑ Pritychenko, Boris. "Adopted Double Beta Decay Data" . National Nuclear Data Center. Retrieved 2008-02-11 . ↑ "Zirconium: zirconium(I) fluoride compound data" . OpenMOPAC.net. Retrieved 2007-12-10 .
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