# Zinc

Zinc, 30Zn|  |
| Zinc |
| Ìhànsójú | silvery gray |
| Ìwúwo átọ̀mù *A*r, std(Zn) | 65.38(2) |
| Zinc ní orí tábìlì àyè |
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|  |  |  |
| --- | --- | --- |
| Hydrogen |  | Helium |
| Lithium | Beryllium |  | Boron | Carbon | Nitrogen | Oxygen | Fluorine | Neon |
| Sodium | Magnesium |  | Aluminium | Silicon | Phosphorus | Sulfur | Chlorine | Argon |
| Potassium | Calcium | Scandium |  | Titanium | Vanadium | Chromium | Manganese | Iron | Cobalt | Nickel | Copper | Zinc | Gallium | Germanium | Arsenic | Selenium | Bromine | Krypton |
| Rubidium | Strontium | Yttrium |  |  | Zirconium | Niobium | Molybdenum | Technetium | Ruthenium | Rhodium | Palladium | Silver | Cadmium | Indium | Tin | Antimony | Tellurium | Iodine | Xenon |
| Caesium | Barium | Lanthanum | Cerium | Praseodymium | Neodymium | Promethium | Samarium | Europium | Gadolinium | Terbium | Dysprosium | Holmium | Erbium | Thulium | Ytterbium | Lutetium | Hafnium | Tantalum | Tungsten | Rhenium | Osmium | Iridium | Platinum | Gold | Mercury (element) | Thallium | Lead | Bismuth | Polonium | Astatine | Radon |
| Francium | Radium | Actinium | Thorium | Protactinium | Uranium | Neptunium | Plutonium | Americium | Curium | Berkelium | Californium | Einsteinium | Fermium | Mendelevium | Nobelium | Lawrencium | Rutherfordium | Dubnium | Seaborgium | Bohrium | Hassium | Meitnerium | Darmstadtium | Roentgenium | Copernicium | Nihonium | Flerovium | Moscovium | Livermorium | Tennessine | Oganesson |

 | - ↑ **Zn** ↓ Cd |
| copper ← **zinc** → gallium |

 |

 |
| Nọ́mbà átọ̀mù (*Z*) | 30 |
| Ẹgbẹ́ | group 12 |
| Àyè | àyè 4  |
| Àdìpọ̀ | Àdìpọ̀-d  |
| Ẹ̀ka ẹ́límẹ́ntì |   Post-transition metal |
| Ìtò ẹ̀lẹ́ktrọ́nù | [Ar] 3d10 4s2 |
| Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 2 |
| Àwọn ohun ìní ara |
| Ìfarahàn at STP | solid |
| Ìgbà ìyọ́ | 692.68 K ​(419.53 °C, ​787.15 °F)  |
| Ígbà ìhó | 1180 K ​(907 °C, ​1665 °F)  |
| Kíki (near r.t.) | 7.14 g/cm3 |
| when liquid (at m.p.) | 6.57 g/cm3  |
| Heat of fusion | 7.32 kJ/mol  |
| Heat of  | 123.6 kJ/mol  |
| Molar heat capacity | 25.470 J/(mol·K)  |
| **pressure**

| *P* (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
| --- | --- | --- | --- | --- | --- | --- |
| at *T* (K) | 610 | 670 | 750 | 852 | 990 | 1179 |

 |
| Atomic properties |
| Oxidation states | −2, 0, +1, **+2** Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
| Electronegativity | Pauling scale: 1.65  |
|  energies | * (more)
 |
| Atomic radius | empirical: 134 pm  |
| Covalent radius | 122±4 pm  |
| Van der Waals radius | 139 pm  |
| Color lines in a spectral range**Spectral lines of zinc** |
| Other properties |
| Natural occurrence | primordial |
| Crystal structure |  ​hexagonal |
| Speed of sound thin rod | (rolled) 3850 m/s (at r.t.)  |
| Thermal expansion | 30.2 µm/(m·K) (at 25 °C)  |
| Thermal conductivity | 116 W/(m·K)  |
| Electrical resistivity | 59.0 n Ω·m (at 20 °C)  |
| Magnetic ordering | diamagnetic  |
| Young's modulus | 108 GPa  |
| Shear modulus | 43 GPa  |
| Bulk modulus | 70 GPa  |
| Poisson ratio | 0.25  |
| Mohs hardness | 2.5  |
| Brinell hardness | 412 MPa  |
| CAS Number | 7440-66-6  |
| Main isotopes of zinc |
|

| Iso­tope | Abun­dance | Half-life (*t*1/2) | Decay mode | Pro­duct |
| --- | --- | --- | --- | --- |
| 64Zn | 48.6% | 64Zn is stable with 34 neutrons |
| 65Zn | syn | 243.8 d | ε | 1.3519 | 65Cu |
| γ | 1.1155 | - |
| 66Zn | 27.9% | 66Zn is stable with 36 neutrons |
| 67Zn | 4.1% | 67Zn is stable with 37 neutrons |
| 68Zn | 18.8% | 68Zn is stable with 38 neutrons
Àdàkọ:Elementbox isotopes decay2 2hl |
| 70Zn | 0.6% | 70Zn is stable with 40 neutrons
Àdàkọ:Elementbox isotopes decay2 2hl |
| 72Zn | syn | 46.5 h | β− | 0.458 | 72Ga |

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## Itokasi