 |
| Arsenic |
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| Pípè | |
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| Ìhànsójú | metallic grey |
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| Ìwúwo átọ̀mù Ar, std(As) | 74.921595(6)[1] |
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| Arsenic ní orí tábìlì àyè |
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|
| Nọ́mbà átọ̀mù (Z) | 33 |
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| Ẹgbẹ́ | group 15 (pnictogens) |
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| Àyè | àyè 4 |
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| Àdìpọ̀ | Àdìpọ̀-p |
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| Ẹ̀ka ẹ́límẹ́ntì | Metalloid |
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| Ìtò ẹ̀lẹ́ktrọ́nù | [Ar] 3d10 4s2 4p3 |
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| Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 5 |
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| Àwọn ohun ìní ara |
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| Ìfarahàn at STP | solid |
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| Sublimation point | 887 K (615 °C, 1139 °F) |
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| Kíki (near r.t.) | 5.727 g/cm3 |
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| when liquid (at m.p.) | 5.22 g/cm3 |
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| Triple point | 1090 K, 3628 [2] kPa |
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| Critical point | 1673 K, ? MPa |
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| Heat of fusion | (grey) 24.44 kJ/mol |
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| Heat of | ? 34.76 kJ/mol |
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| Molar heat capacity | 24.64 J/(mol·K) |
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pressure| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
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| at T (K) | 553 | 596 | 646 | 706 | 781 | 874 |
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|
| Atomic properties |
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| Oxidation states | −3, −2, −1, 0,[3] +1,[4] +2, +3, +4, +5 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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| Electronegativity | Pauling scale: 2.18 |
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| energies | |
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| Atomic radius | empirical: 119 pm |
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| Covalent radius | 119±4 pm |
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| Van der Waals radius | 185 pm |
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 Color lines in a spectral rangeSpectral lines of arsenic |
| Other properties |
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| Natural occurrence | primordial |
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| Crystal structure | rhombohedral |
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| Thermal conductivity | 50.2 W/(m·K) |
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| Electrical resistivity | 333 n Ω·m (at 20 °C) |
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| Magnetic ordering | diamagnetic[5] |
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| Young's modulus | 8 GPa |
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| Bulk modulus | 22 GPa |
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| Mohs hardness | 3.5 |
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| Brinell hardness | 1440 MPa |
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| CAS Number | 7440-38-2 |
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| Main isotopes of arsenic |
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| Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
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| 73As | syn | 80.3 d | ε | - | 73Ge | | γ | 0.05D, 0.01D, e | - | | 74As | syn | 17.78 d | ε | - | 74Ge | | β+ | 0.941 | 74Ge | | γ | 0.595, 0.634 | - | | β− | 1.35, 0.717 | 74Se | | 75As | 100% | 75As is stable with 42 neutrons |
|
Àdàkọ:Category-inline
| references |
