Rikunarita-ORG/Wikinium huggingface dataset:
# Actiniwm

Actiniwm|  |
| Enghraifft o: | elfen gemegol, elfen ymbelydrol  |
| Màs | 227.028 uned Dalton  |
| Fformiwla gemegol | Ac  |
| Dyddiad darganfod | 1899  |
| Symbol | Ac  |
| Rhif atomig | 89  |
| Electronegatifedd | 1.1  |
| Cyflwr ocsidiad | 1.1  |
| Rhan o | Elfen grŵp 3, Elfen cyfnod 7  |
| Dynodwyr |
| SMILES | [ac]  |
| Freebase | /M/027sjs4  |
| CAS | 7440-34-8  |
| PubChem CID | 23965  |
| ChEBI | 33337  |
| InChI | Inchi=1s/ac  |
| ChemSpider | 22404  |
| UNII | Nik1k0956u  |
| Drugbank | Db12860  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| Actiniwm

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| Actiniwm |
| Actiniwm mewn cynhwysydd |

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| Symbol | Ac |
|  Rhif | 89 |
| Dwysedd | 10 g/cm³ |

Elfen gemegol ymbelydrol ydy **actiniwm** gyda'r symbol `**Ac**` a'r rhif atomig 89 yn y tabl cyfnodol.

Mae'n arian o ran lliw ac oherwydd ei allu ymbelydrol uchel, mae'n disgleirio'n las golau yn y tywyllwch. Mae 150 gwaith yn gryfach ei ymbelydredd na radiwm.

Mae ganddo 36 isotop, y mwyaf sefydlog ydy 227Ac gyda'i hanner oes yn 21.772 blwyddyn.

Cafodd ei ddarganfod yn 1899 a hynny gan y cemegydd Ffrengig André-Louis Debierne. Daw'r gair allan o'r hen Roeg aktis, aktinos (ακτίς, ακτίνος), sy'n golygu pelydryn o olau.

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

Wiciadur
Chwiliwch am actiniwm
yn Wiciadur.
# Protactiniwm

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| Protactiniwm

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| Protactiniwm |
| Protactiniwm mewn cynhwysydd |

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| Symbol | Pa |
|  Rhif | 91 |
| Dwysedd | 15.37 g/cm³ |

Elfen gemegol gwan o ran ymbelydredd a ganfyddir yn naturiol yn y ddaear ydy **protactiniwm** sydd â'r symbol **Pa** a'r rhif atomig 91 yn y tabl cyfnodol.

Mae'n fetal prin a hynod o ymbelydrol.

Mae ganddo 29 isotop, y mwyaf sefydlog ydy 231Pa gyda'i hanner-oes o 32760 blwyddyn.

Er i Crookes wahanu'r metal oddi wrth iwraniwm yn 1900, y ddau cemegydd Kasimir Fajans a O. H. Göring wnaeth ei adnabod fel metal newydd a'i enwi'n *brevium* gan fod un isotop ohono â hanner-oes o ddim ond 1.17 munud. Ystyr y gair Lladin *brevium* ydy ' 'byr' neu 'oes fer'. Yn 1918 newidiwyd yr enw i Protactiniwm sy'n dod o'r iaith Roeg πρῶτος + ἀκτίς sef "elfen y pelydr cyntaf").

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

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| Neptwniwm

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| Neptwniwm |
| Neptwniwm mewn cynhwysydd |

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| Symbol | Np |
|  Rhif | 93 |
| Dwysedd | 20.45 g/cm³ |

Elfen gemegol ymbelydrol a ganfyddir yn naturiol yn y ddaear ydy **neptwniwm** sydd â'r symbol `**Np**` a'r rhif atomig 93 yn y tabl cyfnodol.

Gellir trin a thrafod y metal meddal hwn yn hawdd; ei liw ydy arian-gwyn. Mae'r eisotop 237Np yn is-gynnyrch pliwtoniwm mewn atomfeydd.

Mae ganddo 19 isotop, y mwyaf sefydlog ydy 237Np gyda'i hanner-oes o 2.14 miliwn o flynyddoedd.

Yn y Tabl cyfnodol, saif y drws nesaf i iwraniwm. Daw ei enw gwreiddiol o "Neptunium" i gofio'r planed Neifion sydd, fel y gwyddys, y drws nesaf i Wranws (a roddodd ei enw i iwraniwm). Edwin McMillan a Philip H. Abelson a ddarganfyddodd y metal hwn a hynny yn 1940 ym Mhrifysgol Califfornia, Berkeley.

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

Plwtoniwm| Modrwy o blwtoniwm sydd a'i burdeb yn 99.96%, yn pwyso 5.3 kg, a'i ddiametr yn 11 cm. Mae hyn yn ddigon i wneud un bom. |
| Enghraifft o: | elfen gemegol, elfen ymbelydrol  |
| Fformiwla gemegol | Pu  |
| Dyddiad darganfod | 1941  |
| Symbol | Pu  |
| Rhif atomig | 94  |
| Electronegatifedd | 1.28 ±0.01  |
| Cyflwr ocsidiad | 1.28 ±0.01  |
| Rhan o | Elfen cyfnod 7, Actinid  |
| Dynodwyr |
| SMILES | [pu]  |
| Freebase | /M/026mkzy  |
| Thesawrws y BNCF | 23908  |
| CAS | 7440-07-5  |
| PubChem CID | 23940  |
| ChEBI | 33388  |
| InChI | Inchi=1s/pu  |
| ChemSpider | 22382  |
| UNII | 53023gn24m  |
| KEGG | C19159  |
| Rhif EC | 231-117-7  |
| ECHA | 100.028.288  |
| PDB | 4zhd  |
| RxNorm CUI | 1600135  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| Plwtoniwm

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| Plwtoniwm mewn cynhwysydd |

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| Symbol | Pu |
|  Rhif | 94 |
| Dwysedd | 19.816 g/cm³ |

Elfen gemegol synthetig ac ymbelydrol ydy **plwtoniwm** sydd â'r symbol `**Pu**` a'r rhif atomig 94 yn y tabl cyfnodol. Ei liw ydy arian-gwyn, ond mae'n pylu yn yr aer gan ocsideiddio.

Mae ganddo 20 isotop ymbelydrol. Y mwyaf sefydlog o'r rhain ydy 244Pu gyda'i hanner-oes o 80 miliwn blwyddyn. Eisotop pwysicaf plwtoniwm ydy 239Pu, sydd a hanner-oes o 24,100 blwyddyn, gan ei fod yn cael ei ddefnyddio mewn arfau niwclear.

Cafodd ei ddarganfod a'i greu am y tro cyntaf yn Rhagfyr 1940 gan Glenn T. Seaborg a'i dîm o wyddonwyr ym Mhrifysgol Califfornia, Berkeley.

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

Americiwm|  |
| Enghraifft o: | elfen gemegol  |
| Màs | 243 uned Dalton  |
| Fformiwla gemegol | Am  |
| Dyddiad darganfod | 1944  |
| Symbol | Am  |
| Rhif atomig | 95  |
| Electronegatifedd | 1.13  |
| Cyflwr ocsidiad | 1.13  |
| Rhan o | Elfen cyfnod 7, Actinid  |
| Dynodwyr |
| SMILES | [am]  |
| Freebase | /M/027sxty  |
| CAS | 7440-35-9  |
| PubChem CID | 23966  |
| ChEBI | 33389  |
| InChI | Inchi=1s/am  |
| ChemSpider | 22405  |
| UNII | Vw92phu2uy  |
| Rhif EC | 231-144-4  |
| ECHA | 100.028.313  |
| PDB | 4zhg  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| Americiwm

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| Americiwm |
| Americiwm mewn cynhwysydd |

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| Symbol | Am |
|  Rhif | 95 |
| Dwysedd | 12 g/cm³ |

Elfen gemegol ydy **americiwm** sydd â'r symbol `**Am**` a'r rhif atomig 95 yn y tabl cyfnodol. Caiff ei ddefnyddio'n helaeth mewn sensorau darganfod tân.

Mae'n fetal gloyw arian-gwyn o ran lliw ac mae ganddo 18 isotop, y mwyaf sefydlog ydy 243Am gyda'i hanner-oes o 7370 blwyddyn.

Americiwm y tu fewn i sensor darganfod tân
Darganfyddwyd americiwm gyntaf yn 1944 gan Glenn T. Seaborg, Leon O. Morgan, Ralph A. James, ac Albert Ghiorso yn ystod yr Ail Ryfel Byd yn labordai Prifysgol Chicago a elwir heddiw yn *Argonne National Laboratory*.

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

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| Curiwm

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| Curiwm |
| Curiwm mewn cynhwysydd |

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| Symbol | Cm |
|  Rhif | 96 |
| Dwysedd | 13.51 g/cm³ |

Elfen gemegol synthetig yw **curiwm** gyda'r symbol `**Cm**` a'r rhif atomig 960 yn y tabl cyfnodol. Mae'n fetal ymbelydrol a chafodd ei enwi ar ôl y gŵr a'r wraig Pierre a Marie Skłodowska-Curie am eu gwaith arloesol gydag ymbelydredd.

Arian-gwyn yw ei liw ac mae ganddo 19 isotop. Y mwyaf sefydlog o'r rhain ydy Cm-247 gyda hanner-oes sydd yn 1.56 × 107 blwyddyn.

Crëwyd Curiwm am y tro cyntaf ym Mhrifysgol Califfornia, Berkeley gan Glenn T. Seaborg, Ralph A. James, a Albert Ghiorso - a hynny yn 1944.

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

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| Califforniwm

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| Califforniwm mewn cynhwysydd |

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| Symbol | Cf |
|  Rhif | 98 |
| Dwysedd | 15.1 g/cm³ |

Elfen gemegol ymbelydrol ydy **califforniwm** gyda'r symbol `**Cf**` a'r rhif atomig 98 yn y tabl cyfnodol.

Mae'n arian-gwyn o ran lliw. Mae ganddi 20 isotop. Y mwyaf sefydlog o'r rhain ydy 251Ac gyda'i hanner-oes yn 898 blwyddyn.

Cafodd yr elfen hon ei chreu am y tro cyntaf ar 9 Chwefror 1950 ym Mhrifysgol Califfornia, Berkeley, y chweched elfed i'w darganfod yno. Y gwyddonwyr a gysylltir a'i darganfod yw Stanley G. Thompson, Kenneth Street, Jr., Albert Ghiorso, a Glenn T. Seaborg.

O'i gymryd i fewn i'r corff, mae'n atal y corff hwnnw rhag creu celloedd gwaed coch.

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

Berceliwm|  |
| Enghraifft o: | elfen gemegol, synthetic element  |
| Fformiwla gemegol | Bk  |
| Dyddiad darganfod | 1949  |
| Symbol | Bk  |
| Rhif atomig | 97  |
| Electronegatifedd | 1.3  |
| Cyflwr ocsidiad | 1.3  |
| Rhan o | Elfen cyfnod 7, Actinid  |
| Dynodwyr |
| SMILES | [bk]  |
| Freebase | /M/025svnm  |
| CAS | 7440-40-6  |
| PubChem CID | 23971  |
| ChEBI | 33391  |
| InChI | Inchi=1s/bk  |
| ChemSpider | 22409  |
| UNII | 2yqa718kuu  |
| Drugbank | Db12993  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| Berkeliwm

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| --- |
| Berkeliwm |
| Berkeliwm mewn cynhwysydd |

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| Symbol | Bk |
|  Rhif | 97 |
| Dwysedd | (alffa) 14.78 g/cm³ |

Elfen gemegol ymbelydrol ydy **berceliwm** gyda'r symbol `**Bk**` a'r rhif atomig 97 yn y tabl cyfnodol.

Mae'n arian o ran lliw ac mae'n ocsideiddio'n sydyn. Mi wneith hefyd hydoddi mewn asid gwan.

Mae ganddo 19 isotop, y mwyaf sefydlog ydy 247Bk gyda'i hanner-oes yn 9 mlynedd.

Dyma'r pumed elfen i gael ei darganfod ym Mhrifysgol Califfornia, Berkeley - a roddodd ei henw iddi. Cafodd ei chreu am y tro cyntaf gan Glenn T. Seaborg, Albert Ghiorso, Stanley G. Thompson, a Kenneth Street Ieuengaf. yn Rhagfyr 1949.

Cyclotron 60 modfedd a ddefnyddiwyd i greu Berceliwm
## Cyfeiriadau

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

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| Einsteiniwm

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| Einsteiniwm |
| Einsteiniwm mewn cynhwysydd |

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| Symbol | Es |
|  Rhif | 99 |
| Dwysedd | 8.84 g/cm³ |

Elfen gemegol ymbelydrol ydy **einsteiniwm** gyda'r symbol `**Es**` a'r rhif atomig 99 yn y tabl cyfnodol.

Ychydig iawn ohono sydd wedi cael ei greu, ond credir mai arian yw lliw'r elfen hon. Ac fel elfennau synthetig eraill mae'n gollwng ymbelydredd eithriadol o gryf. Ni wneir unrhyw ddefnydd masnachol ohoni.

Mae ganddo 19 isotop, y mwyaf sefydlog ydy 252Es gyda'i hanner-oes yn 471.7 diwrnod.

Cafodd ei henwi ar ôl y gwyddonydd Albert Einstein a'i darganfod yn Rhagfyr 1952 gan Albert Ghiorso ym Mhrifysgol Califfornia, Berkeley.

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