Rikunarita-ORG/Wikinium huggingface dataset:
# Ffermiwm

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Ffermiwm

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|  |
| --- |
| Ffermiwm |
| Ffermiwm mewn cynhwysydd |

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|  |
| Symbol | Fm |
|  Rhif | 100 |
| Dwysedd | ? g/cm³ |

Elfen gemegol ymbelydrol ydy **ffermiwm** gyda'r symbol `**Fm**` a'r rhif atomig 100 yn y tabl cyfnodol a gaiff ei greu drwy fombardio plwtoniwm gyda niwtronau. Dim ond ychydig iawn o Ffermiwm sydd wedi cael ei greu erioed.

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

Mae ganddo 17 isotop. Y mwyaf sefydlog o'r rhain ydy 257Ac gyda'i hanner-oes yn 100.5 diwrnod.

Cafodd ei ddarganfod gan Albert Ghiorso ym Mhrifysgol Califfornia, Berkeley, yn 1952 a'i enwi ar ôl y gwyddonydd Enrico Fermi.

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

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Mendelefiwm

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|  |
| --- |
| Mendelefiwm |
| Mendelefiwm mewn cynhwysydd |

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|  |
| Symbol | Md |
|  Rhif | 101 |
| Dwysedd | 6∙10 g/cm³ |

Elfen gemegol ymbelydrol, synthetig ydy **mendelefiwm** gyda'r symbol `**Md**` a'r rhif atomig 101 yn y tabl cyfnodol a gaiff ei greu drwy fombardio einsteinium gyda gronynnau Alffa. Dim ond ychydig iawn o Ffermiwm sydd wedi cael ei greu erioed.

Mae ganddo 16 isotop. Y mwyaf sefydlog o'r rhain ydy 258Md, gyda'i hanner-oes yn 51.5 diwrnod.

Cafodd ei ddarganfod gan Albert Ghiorso, Glenn T. Seaborg, Gregory R. Choppin, Bernard G. Harvey, a Stanley G. Thompson (arweinydd y tîm) ym Mhrifysgol Califfornia, Berkeley, yn 1952 a'i enwi ar ôl y gwyddonydd Dmitri Mendeleev a oedd yn gyfrifol am greu'r Tabl cyfnodol.

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

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Nobeliwm

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|  |
| --- |
| Nobeliwm |
| Nobeliwm mewn cynhwysydd |

 |
|  |
| Symbol | No |
|  Rhif | 102 |
| Dwysedd | ? g/cm³ |

Elfen gemegol ymbelydrol ydy **nobeliwm** gyda'r symbol `**No**` a'r rhif atomig 102 yn y tabl cyfnodol.

Mae ganddo 17 isotop, y mwyaf sefydlog ydy 259Ac gyda'i hanner-oes yn 58 munud.

Cafodd ei ddarganfod am y tro cyntaf yn 1956 gan wyddonwyr o Labordai Adweithiau Niwclear Flerov, Dubna, Rwsia. Ychydig iawn a wyddom am yr elfen hon. Cyhoeddwyd fod yr elfen hon wedi'i darganfod yn Sefydliad Nobel, Sweden a phenderfynwyd ei fedyddio'n Nobeliwm i goffau Alfred Nobel.

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

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Lawrenciwm

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|  |
| --- |
| Lawrenciwm |
| Lawrenciwm mewn cynhwysydd |

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|  |
| Symbol | Lr |
|  Rhif | 103 |
| Dwysedd | xx kg m-3 |

Elfen ymbelydrol, synthetig yw **lawrenciwm** (neu **lawrensiwm**). Fe'i dynodir gan y symbol `**Lr**` a'r rhif 103 yn tabl cyfnodol. Yr isotop mwyaf sefydlog ohono ydy 262Lr, sydd â hanner oes o oddeutu 3.6 awr.

Mae'r enw'n tarddu o enw'r gwyddonydd Ernest O. Lawrence o Brifysgol Califfornia, Berkeley a ddyfeisiodd y cyflymydd gronynnau cylchotron.

## Isotopau, a'r blynyddoedd y cawsant eu darganfod

| Isotop
 | blwyddyn eu darganfod
 | adwaith
 |
| --- | --- | --- |
| 252Lr
 | 2001
 | 209Bi(50Ti,3n)
 |
| 253Lrg | 1985
 | 209Bi(50Ti,2n)
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| 253Lrm | 2001
 | 209Bi(50Ti,2n)
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| 254Lr
 | 1985
 | 209Bi(50Ti,n)
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| 255Lr
 | 1970
 | 243Am(16O,4n)
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| 256Lr
 | 1961? 1965? 1968? 1971
 | 252Cf(10B,6n)
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| 257Lr
 | 1958? 1971
 | 249Cf(15N,α3n)
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| 258Lr
 | 1961? 1971
 | 249Cf(15N,α2n)
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| 259Lr
 | 1971
 | 248Cm(15N,4n)
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| 260Lr
 | 1971
 | 248Cm(15N,3n)
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| 261Lr
 | 1987
 | 254Es + 22Ne
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| 262Lr
 | 1987
 | 254Es + 22Ne
 |

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

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| Rutherfordiwm

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|  |
| --- |
| Rutherfordiwm |
| Rutherfordiwm mewn cynhwysydd |

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|  |
| Symbol | Rf |
|  Rhif | 104 |
| Dwysedd | xx g/cm³ |

Elfen gemegol yw **rutherfordiwm** gyda'r symbol `**TRf**` a'r rhif atomig 2104 yn y tabl cyfnodol. Mae'n elfen ymbelydrol synthetig, a'r isotop mwyaf sefydlog ohono ydy 267Rf, sydd â hanner oes o oddeutu 1.3 awr.

Cafodd yr elfen hon ei henwi ar ôl y gwyddonydd Ernest Rutherford o Seland Newydd yn 1997.

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

Wiciadur
Chwiliwch am rutherfordiwm
yn Wiciadur.
# Dubniwm

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Dubniwm

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|

|  |
| --- |
| Dubniwm |
| Dubniwm mewn cynhwysydd |

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|  |
| Symbol | Db |
|  Rhif | 105 |
| Dwysedd | xx g/cm³ |

Elfen gemegol yw **dubniwm** gyda'r symbol `**Db**` a'r rhif atomig 105 yn y tabl cyfnodol.

Mae'n elfen ymbelydrol synthetig, a'i isotop mwyaf sefydlog ohono ydy 268Db, sydd â hanner oes o tua 28 awr.

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

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| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Seaborgiwm

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| --- | --- | --- |
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|

|  |
| --- |
| Seaborgiwm |
| Seaborgiwm mewn cynhwysydd |

 |
|  |
| Symbol | Sg |
|  Rhif | 106 |
| Dwysedd | heb ei ddarganfod g/cm³ |

Elfen gemegol synthetig yw **seaborgiwm** ac mae ganddo'r symbol cemegol `**Sg**` a'r rhif atomig 106 yn y tabl cyfnodol. Yr isotop mwyaf sefydlog ohono ydy 271Sg, sydd â hanner oes o oddeutu 1.9 munud.

Cafodd yr elfen hon ei henwi ar ôl yr Americanwr Glenn T. Seaborg, a hynny yn 1997.

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

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| Hassiwm

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| --- |
| Hassiwm |
| Hassiwm mewn cynhwysydd |

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| Symbol | Hs |
|  Rhif | 108 |
| Dwysedd | xx g/cm³ |

Elfen gemegol yw **hasiwm** gyda'r symbol `**Hs**` a'r rhif atomig 108 yn y tabl cyfnodol.

Crëwyd yr elfen hon yn gyntaf yn 1984 gan yr Almaenwyr Peter Armbruster a Gottfried Münzenberg. Cafodd ei henwi ar ôl enw Lladin y dalaith Almaenig Hesse, lle y gwnaed y darganfyddiad.

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

Bohriwm| Enghraifft o: | elfen gemegol, synthetic element  |
| Math | Elfen drosiannol  |
| Dyddiad darganfod | 1976  |
| Symbol | Bh  |
| Rhif atomig | 107  |
| Trefn yr electronnau | [Rn] 5f¹⁴ 6d⁵ 7s²  |
| Rhan o | Elfen cyfnod 7, Elfen Grŵp 7  |
| Dynodwyr |
| Freebase | /M/025s\_py  |
| Quora | Bohrium  |
|  Ffeiliau perthnasol ar Gomin Wicimedia |

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| Bohriwm

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| --- |
| Bohriwm |
| Bohriwm mewn cynhwysydd |

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| Symbol | Bh |
|  Rhif | 107 |
| Dwysedd | xx kg m-3 |

Elfen gemegol ymbelydrol, synthetig yw **bohriwm**. Fe'i dynodir gan y symbol `**Bh**` a'r rhif 107 yn tabl cyfnodol. Yr isotop mwyaf sefydlog ohono ydy 270Bh, sydd â hanner oes o 61 eiliad.

Mae'r enw'n tarddu o enw'r gwyddonydd Niels Bohr o'r Iseldiroedd a oedd yn un o'r gwyddonwyr a ddarganfu fohriwm.

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

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| Meitneriwm

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| --- |
| Meitneriwm |
| Meitneriwm mewn cynhwysydd |

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| Symbol | Mt |
|  Rhif | 109 |
| Dwysedd | xx g/cm³ |

Elfen gemegol yw **meitneriwm** gyda'r symbol `**Mt**` a'r rhif atomig 109 yn y tabl cyfnodol.

Mae'n elfen synthetig, a'i isotop mwyaf sefydlog yw 278Mt, sydd â hanner oes o ryw 8 eiliad.

Cafodd ei greu am y tro cyntaf ar 29 Awst 1982 gan ddau wyddonydd o'r Almaen, Peter Armbruster a Gottfried Münzenberg, a hynny yn Darmstadt. *Iridiwm* oedd yr hen enw arno ond newidiwyd yr enw yn 1997 i gofio'r gwyddonydd Lise Meitner.

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