Rikunarita-ORG/Wikinium huggingface dataset:
# Antimoni

Antimoni|  |
| Enghraifft o: | elfen gemegol, elfen chalcophile  |
| Math | Metaloid, Elfen cyfnod 5  |
| Màs | 121.76 ±0.001 uned Dalton  |
| Fformiwla gemegol | Sb  |
| Symbol | Sb  |
| Rhif atomig | 51  |
| Trefn yr electronnau | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d¹⁰ 4p⁶ 5s² 5d¹⁰ 5p³, [Kr] 5s² 5d¹⁰ 5p³  |
| Electronegatifedd | 2.05  |
| Cyflwr ocsidiad | 2.05  |
| Rhan o | Elfen cyfnod 5, Elfen Grŵp 15, antimony compound  |
| Dynodwyr |
| SMILES | [sb]  |
| Freebase | /M/027s2zq  |
| Thesawrws y BNCF | 20962  |
| CAS | 7440-36-0  |
| PubChem CID | 5354495  |
| ChEBI | 30513  |
| InChI | Inchi=1s/sb  |
| ChemSpider | 4510681  |
| UNII | 9it35j3uv3  |
| Rhif EC | 231-146-5  |
| Drugbank | Db13110  |
| ECHA | 100.028.314  |
| RxNorm CUI | 1311407  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| Antimoni

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| Antimoni mewn cynhwysydd |

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| Symbol | Sb |
|  Rhif | 51 |
| Dwysedd | 6.697  g·cm−3 |

Elfen gemegol yw **antimoni** (symbol `Sb`) sy'n un o elfennau'r tabl cyfnodol. Yn ôl pob tebyg roedd eisoes yn adnabyddus i drigolion yr Henfyd cyn iddi gael ei disgrifio'n wyddonol am y tro cyntaf gan Tholden yn 1450. Mae i'w cael mewn natur fel elfen a hefyd fel rhan o'r cyfansoddyn swlffid stibneit (*stibnite*: Sb2S3).

Ei symbol yw **Sb** a'i rif atomig yw 51. Mae'n perthyn i'r grŵp hwnnw a elwir yn fetaloidau.

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

Wiciadur
Chwiliwch am antimoni
yn Wiciadur.
# Ïodin

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| Ïodin

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| Ïodin mewn cynhwysydd |

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| Symbol | I |
|  Rhif | 53 |
| Dwysedd | {{{dwysedd}}} |

Ïodin|  |
| Enghraifft o: | elfen gemegol, lithophile  |
| Math | Elfen cyfnod 5, Anfetel, Halogen, diatomic nonmetal  |
| Màs | 126.90447 ±3e-05 uned Dalton  |
| Dyddiad darganfod | 1811  |
| Symbol | I  |
| Rhif atomig | 53  |
| Trefn yr electronnau | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁵, [Kr] 5s² 4d¹⁰ 5p⁵  |
| Electronegatifedd | 3  |
| Cyflwr ocsidiad | 3  |
| Rhan o | Elfen cyfnod 5, Halogen  |
| Dynodwyr |
| Freebase | /M/025rw2h  |
| Thesawrws y BNCF | 20089  |
| ChEBI | 36897  |
| ChemSpider | 4514549  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

Elfen gemegol yw **ïodin** gyda'r symbol `**I**` a'r rhif atomig 53 yn y tabl cyfnodol.
Mae'r ïodin yng ngrŵp yr Halogenau.

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

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| Lanthanwm

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| Lanthanwm mewn cynhwysydd |

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| Symbol | La |
|  Rhif | 57 |
| Dwysedd | 6.162 g/cm³ |

Elfen gemegol yw **lanthanwm** gyda'r symbol `**La**` a'r rhif atomig 57 yn y tabl cyfnodol. Arianwyn ydy ei lliw, ac mae'n perthyn i Grwp 3 yn y tabl cyfnodol.

Mae'n fetal cymharol feddal. Daw'r gair o'r iaith Roeg *λανθανω* [lanthanō], sef "cuddiedig". Cafodd ei ddarganfod yn 1839 gan y cemegydd Carl Gustav Mosander o Sweden.

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

Bariwm|  |
| Enghraifft o: | elfen gemegol, lithophile  |
| Màs | 137.327 ±0.007 uned Dalton  |
| Fformiwla gemegol | Ba  |
| Dyddiad darganfod | 1808  |
| Symbol | Ba  |
| Rhif atomig | 56  |
| Trefn yr electronnau | [Xe] 6s², 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d¹⁰ 4p⁶ 5s² 5d¹⁰ 5p⁶ 6s²  |
| Electronegatifedd | 0.89  |
| Cyflwr ocsidiad | 0.89  |
| Rhan o | Elfen cyfnod 6, metel daear alcalïaidd  |
| Dynodwyr |
| SMILES | [ba]  |
| Freebase | /M/025svml  |
| Thesawrws y BNCF | 31174  |
| CAS | 7440-39-3  |
| PubChem CID | 5355457  |
| ChEBI | 32595, 32594  |
| InChI | Inchi=1s/ba  |
| ChemSpider | 4511436  |
| UNII | 24gp945v5t  |
| Rhif EC | 231-149-1  |
| Drugbank | Db12481  |
| ECHA | 100.028.317  |
| RxNorm CUI | 1311067  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| Bariwm

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| Bariwm mewn cynhwysydd |

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| Symbol | Ba |
|  Rhif | 56 |
| Dwysedd | 3.51  g·cm−3 |

Elfen gemegol yn y tabl cyfnodol ac iddo'r symbol `**Ba**` a'r rhif 56 yw **bariwm**. Cafodd bariwm ei ddarganfod gan Carl Wilhelm Scheede ym 1772.

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

Wiciadur
Chwiliwch am bariwm
yn Wiciadur.
# Ceriwm

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| Ceriwm

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| Ceriwm mewn cynhwysydd |

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| Symbol | Ce |
|  Rhif | 58 |
| Dwysedd | xx g/cm³ |

Elfen gemegol yw **ceriwm** gyda'r symbol `**Ce**` a'r rhif atomig 58 yn y tabl cyfnodol.

Mae'n fetal meddal, arian ei lliw sy'n ocsideiddio yn hawdd. Caiff ei defnyddio mewn lampiau fflworesant.

Cafodd y metal hwn ei ddarganfod yn Sweden yn 1803 gan Jöns Jakob Berzelius a Wilhelm Hisinger; yr un adeg, fe'i darganfyddwyd gan yr Almaenwr Martin Heinrich Klaproth. Cafodd ei enwi gan Berzelius ar ôl y planed Ceres a oedd newydd ei darganfod dwy flynedd ynghynt.

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

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| Neodymiwm

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| Neodymiwm mewn cynhwysydd |

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| Symbol | Nd |
|  Rhif | 60 |
| Dwysedd | 7.01  g·cm−3 |

Elfen gemegol yw **neodymiwm** gyda'r rhif atomig 60 a'r symbol `Nd`.

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

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| Praseodymiwm

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| --- |
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| Praseodymiwm mewn cynhwysydd |

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|  |
| Symbol | Pr |
|  Rhif | 59 |
| Dwysedd | 6.77  g·cm−3 |

Elfen gemegol yw **praseodymiwm** gyda'r rhif atomig 59 a'r symbol `Pr`.

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

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Promethiwm

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| --- |
| Promethiwm |
| Promethiwm mewn cynhwysydd |

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|  |
| Symbol | Pm |
|  Rhif | 61 |
| Dwysedd | xx g/cm³ |

Elfen gemegol yw **promethiwm** gyda'r symbol **Pm** a'r rhif atomig 61 yn y tabl cyfnodol. Ar adegau prin, caiff ei greu'n naturiol mewn mwynau pan fo iwraniwm 328 yn dadelfennu.

Mae'n elfen ymbelydrol, a'i isotop mwyaf sefydlog ohono ydy 145Pm, sydd â 'hanner-oes' o 17.7 blwyddyn. Ceir 36 isotôp.

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

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Samariwm

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| --- |
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| Samariwm mewn cynhwysydd |

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| Symbol | Sm |
|  Rhif | 62 |
| Dwysedd | 7.52 g·cm−3 |

Elfen gemegol yw **samariwm** gyda'r rhif atomig 62 a'r symbol `Sm`.

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

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Gadoliniwm

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| Gadoliniwm mewn cynhwysydd |

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| Symbol | Gd |
|  Rhif | 64 |
| Dwysedd | 7.90 g·cm−3 |

Elfen gemegol yw **gadoliniwm** gyda'r rhif atomig 64 a'r symbol `Gd`.

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

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Ewropiwm

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| Ewropiwm mewn cynhwysydd |

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| Symbol | Eu |
|  Rhif | 63 |
| Dwysedd | 5.264 g·cm−3 |

Elfen gemegol yw **ewropiwm** gyda'r rhif atomig 63 a'r symbol `Eu`.

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