Rikunarita-ORG/Wikinium huggingface dataset:
# Iridiwm

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| Iridiwm

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| --- |
|  |
| Iridiwm mewn cynhwysydd |

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|  |
| Symbol | Ir |
|  Rhif | 77 |
| Dwysedd | 22.42  g·cm−3 |

Elfen gemegol yw **iridiwm** gyda'r rhif atomig 77 a'r symbol `Ir`.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*

Wiciadur
Chwiliwch am iridiwm
yn Wiciadur.
# Platinwm

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Platinwm

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| --- |
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| Platinwm mewn cynhwysydd |

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|  |
| Symbol | Pt |
|  Rhif | 78 |
| Dwysedd | 21.45  g·cm−3 |

Elfen gemegol yw **platinwm** â'r symbol `**Pt**` . Mae'n fetel liw arianaidd oedd yn adnabyddus i Indiaid De America. Yn Ewrop fe'i darganfuwyd gan Charles Wood yn 1741.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*

Wiciadur
Chwiliwch am platinwm
yn Wiciadur.
# Thaliwm

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Thaliwm

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| --- |
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| Thaliwm mewn cynhwysydd |

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| Symbol | Tl |
|  Rhif | 81 |
| Dwysedd | {{{dwysedd}}} |

Elfen gemegol yw **Thaliwm** gyda'r symbol `**Tl**` a'r rhif atomig 81 yn y tabl cyfnodol.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*

Wiciadur
Chwiliwch am thaliwm
yn Wiciadur.
# Plwm

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Plwm

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| --- |
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| Plwm mewn cynhwysydd |

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| Symbol | Pb |
|  Rhif | 82 |
| Dwysedd |  |

Plwm|  |
| Enghraifft o: | elfen gemegol, sylweddyn syml, superconducting element, elfen chalcophile  |
| Math | post-transition metal  |
| Lliw/iau | llwyd  |
| Deunydd | galena, boulangerite, anglesite, cerussite  |
| Màs | 207.2 ±1.1 uned Dalton  |
| Fformiwla gemegol | Pb  |
| Symbol | Pb  |
| Rhif atomig | 82  |
| Electronegatifedd | 2  |
| Cyflwr ocsidiad | 2  |
| Rhan o | Elfen cyfnod 6, Elfen Grŵp 14  |
| Dynodwyr |
| SMILES | [pb]  |
| Freebase | /M/025r\_0t  |
| Thesawrws y BNCF | 17757  |
| CAS | 7439-92-1  |
| PubChem CID | 5352425  |
| ChEBI | 27889, 25016  |
| InChI | Inchi=1s/pb  |
| ChemSpider | 4509317  |
| UNII | 2p299v784p  |
| Rhif EC | 231-100-4  |
| ECHA | 100.028.273  |
| RxNorm CUI | 6260  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

Elfen gemegol yw **plwm** â'r symbol `**Pb**`. Mae pobl wedi bod yn mwyngloddio plwm ers rhai miloedd o flynyddoedd, gan gynnwys y Rhufeiniaid pan ddaethant i Gymru, er enghraifft ar Fynydd Parys, Môn.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*
# Bismwth

Bismwth|  |
| Enghraifft o: | elfen gemegol, cynwydd, elfen chalcophile, diamagnetic material  |
| Math | post-transition metal  |
| Màs | 208.9804 ±1e-05 uned Dalton  |
| Fformiwla gemegol | Bi  |
| Clefydau i'w trin | Clefyd heintus bacterol, shigellosis, heintiad e.coli, clefyd achludol rhedwelïol, clefyd heintus firol  |
| Symbol | Bi  |
| Rhif atomig | 83  |
| Electronegatifedd | 2.02  |
| Cyflwr ocsidiad | 2.02  |
| Rhan o | Elfen cyfnod 6, Elfen Grŵp 15  |
| Enw brodorol | Bismuth  |
| Dynodwyr |
| SMILES | [bi]  |
| Freebase | /M/025svp8  |
| Thesawrws y BNCF | 31234  |
| CAS | 7440-69-9  |
| PubChem CID | 5359367  |
| ChEBI | 33301  |
| InChI | Inchi=1s/bi  |
| ChemSpider | 4514266  |
| UNII | U015tt5i8h, och2v0z37n  |
| Rhif EC | 231-177-4  |
| ECHA | 100.028.343  |
| PDB | 4h0w  |
| RxNorm CUI | 1599  |
| UMLS CUI | C0005642  |
| NDF-RT | N0000148861  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| Bismwth

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| --- |
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| Bismwth mewn cynhwysydd |

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| Symbol | Bi |
|  Rhif | 83 |
| Dwysedd | 9.78 g·cm−3 |

Elfen gemegol yw **bismwth** gyda'r rhif atomig 83 a'r symbol `Bi`.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*

Wiciadur
Chwiliwch am bismwth
yn Wiciadur.
# Poloniwm

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| Poloniwm

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|  |
| --- |
| Poloniwm |
| Poloniwm mewn cynhwysydd |

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|  |
| Symbol | Po |
|  Rhif | 84 |
| Dwysedd | 9.196  g·cm (alpha)−39.398  g·cm−3 (beta) |

Elfen gemegol yw **poloniwm** a gynrychiolir gyda'r symbol `**Po**` a'r rhif atomig 84 yn y tabl cyfnodol. Mae'n perthyn i'r grŵp hwnnw a elwir yn fetaloidau.

Cafodd ei ddarganfod yn 1898 gan Marie Skłodowska-Curie a'i gŵr Pierre Curie.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*

Wiciadur
Chwiliwch am poloniwm
yn Wiciadur.
# Astatin

Astatin|  |
| Enghraifft o: | elfen gemegol, synthetic element  |
| Math | Metaloid, Halogen  |
| Dyddiad darganfod | 1940  |
| Symbol | At  |
| Rhif atomig | 85  |
| Electronegatifedd | 2.2  |
| Cyflwr ocsidiad | 2.2  |
| Rhan o | Elfen cyfnod 6, Halogen  |
| Dynodwyr |
| Freebase | /M/027t9kn  |
| PubChem CID | 5460479  |
| ChEBI | 30415, 30416  |
| ChemSpider | 4573995  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Astatin

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 |
|

|  |
| --- |
| Astatin |
| Astatin mewn cynhwysydd |

 |
|  |
| Symbol | At |
|  Rhif | 85 |
| Dwysedd | 2.70 g/cm³ |

Elfen gemegol ymbelydrol ydy **Astatin** gyda'r symbol `**At**` a'r rhif atomig 85 yn y tabl cyfnodol. Cafodd ei ddarganfod, neu ei greu, gan Dale R. Corson, Kenneth Ross MacKenzie, ac Emilio Segrè yn 1940 ac mae ei 'hanner-oes' yn funudau. Nid oes neb wedi llwyddo i'w weld neu dynnu ei lun ond credir mai lliw du sydd ganddo.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*
# Radon

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| Radon

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| Radon |
| Radon mewn cynhwysydd |

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| Symbol | Rn |
|  Rhif | 86 |
| Dwysedd | {{{dwysedd}}} |

Radon|  |
| Enghraifft o: | elfen gemegol, nwy  |
| Fformiwla gemegol | Rn  |
| Dyddiad darganfod | 1899  |
| Symbol | Rn  |
| Rhif atomig | 86  |
| Trefn yr electronnau | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶, [Xe] 6s² 4f¹⁴ 5d¹⁰ 6p⁶  |
| Electronegatifedd | 2.2  |
| Cyflwr ocsidiad | 2.2  |
| Rhan o | Elfen cyfnod 6, Nwy nobl  |
| Dynodwyr |
| SMILES | [rn]  |
| Freebase | /M/025scmp  |
| Thesawrws y BNCF | 18886  |
| CAS | 10043-92-2  |
| PubChem CID | 24857  |
| ChEBI | 33314, 49997  |
| InChI | Inchi=1s/rn  |
| ChemSpider | 23240  |
| UNII | Q74s4n8n1g  |
| Rhif EC | 233-146-0  |
| ECHA | 100.030.120  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

Elfen gemegol yw **radon** gyda'r symbol `**Rn**` a'r rhif atomig 86 yn y tabl cyfnodol.

Mae’n nwy nobl. Mae yn ddi-liw, ac yn ddi-arogl. Mae yn un o’r sylweddau trymaf sydd yn nwy o dan amgylchiadau arferol ac yn cael ei ystyried fel perygl i’r iechyd. Mae radon yn cael ei ddefnyddio ar gyfer radiotherapi. Mae yn ymbelydrol.

Mae radon yn effeithio ar ansawdd yr aer dros y byd. Mae radon o ffynonellau naturiol yn casglu mewn adeiladau ac mae’n debyg ei fod wedi achosi 21,000 o farwolaethau gan cancr yr ysgyfaint.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*
# Ffranciwm

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| Ffransiwm

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| Ffransiwm |
| Ffransiwm mewn cynhwysydd |

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| Symbol | Fr |
|  Rhif | 87 |
| Dwysedd | 1.87  g·cm−3 |

Elfen gemegol yw **ffranciwm** neu **ffransiwm** gyda'r rhif atomig 87 a'r symbol Fr. Mae'n rhan o 'r metelau alcalïaidd yn y tabl cyfnodol. Mae'n metel ymbelydrol sy'n bresennol mewn meintiau bach mewn mwynau thoriwm a wraniwm. Dim ond maint bach sy'n bodoli ar y ddaear, ac amcangyfrif o'r mas sy'n bresennol ar y ddaear ar unrhyw adeg yw 30 gram.

 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*
# Radiwm

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| Radiwm

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| Radiwm |
| Radiwm mewn cynhwysydd |

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| Symbol | Ra |
|  Rhif | 88 |
| Dwysedd | 5.5 g/cm3 |

Radiwm|  |
| Enghraifft o: | elfen gemegol  |
| Fformiwla gemegol | Ra  |
| Dyddiad darganfod | 1898  |
| Symbol | Ra  |
| Rhif atomig | 88  |
| Trefn yr electronnau | [Rn] 7s²  |
| Electronegatifedd | 0.9  |
| Cyflwr ocsidiad | 0.9  |
| Rhan o | Elfen cyfnod 7, metel daear alcalïaidd  |
| Dynodwyr |
| SMILES | [ra]  |
| Freebase | /M/025scm7  |
| CAS | 7440-14-4  |
| PubChem CID | 6328144  |
| ChEBI | 33325  |
| InChI | Inchi=1s/ra  |
| ChemSpider | 4886483  |
| UNII | W90ayd6r3q  |
| Rhif EC | 231-122-4  |
| ECHA | 100.028.293  |
| RxNorm CUI | 1546450  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

Elfen gemegol ymbelydrol a geir mewn mwynau wraniwm yw **radiwm** (o'r Ladin *radius*, "pelydryn"). Mae'n un o'r metelau daear alcalïaidd ac mae ganddo'r symbol **Ra** a'r rhif atomig 88. Mae'n wyn fel arfer ond mae'n troi'n ddu ym mhresenoldeb aer. Mae gan ei isotop mwyaf cyffredin, 226**Ra**, hanner oes o tua 1,602 o flynyddoedd. Darganfuwyd radiwm ym 1898 gan Marie Curie a'i gŵr Pierre Curie.

Plisg electronau radiwm
 *Eginyn erthygl sydd uchod am **gemeg**. Gallwch helpu Wicipedia drwy ychwanegu ato.*