Oddi wrth Wicipedia, y gwyddoniadur rhydd.
	    
	    	    	    
	    
| Rhif | Elfen | Sym. | 
| 1 | hydrogen | H | 
| 2 | heliwm | He | 
| 3 | lithiwm | Li | 
| 4 | beriliwm | Be | 
| 5 | boron | B | 
| 6 | carbon | C | 
| 7 | nitrogen | N | 
| 8 | ocsigen | O | 
| 9 | fflworin | F | 
| 10 | neon | Ne | 
| 11 | sodiwm | Na | 
| 12 | magnesiwm | Mg | 
| 13 | alwminwm | Al | 
| 14 | silicon | Si | 
| 15 | ffosfforws | P | 
| 16 | sylffwr | S | 
| 17 | clorin | Cl | 
| 18 | argon | Ar | 
| 19 | potasiwm | K | 
| 20 | calsiwm | Ca | 
| 21 | scandiwm | Sc | 
| 22 | titaniwm | Ti | 
| 23 | vanadiwm | V | 
| 24 | cromiwm | Cr | 
| 25 | manganîs | Mn | 
| 26 | haearn | Fe | 
| 27 | cobalt | Co | 
| 28 | nicel | Ni | 
| 29 | copr | Cu | 
| 30 | sinc | Zn | 
| 31 | galiwm | Ga | 
| 32 | germaniwm | Ge | 
| 33 | arsenig | As | 
| 34 | seleniwm | Se | 
| 35 | bromin | Br | 
| 36 | krupton | Kr | 
| 37 | rwbidiwm | Rb | 
| 38 | strontiwm | Sr | 
| 39 | ytriwm | Y | 
| 40 | sirconiwm | Zr | 
| 41 | niobiwm | Nb | 
| 42 | molybdenwm | Mo | 
| 43 | technetiwm | Tc | 
| 44 | rutheniwm | Ru | 
| 45 | rhodiwm | Rh | 
| 46 | paladiwm | Pd | 
| 47 | arian | Ag | 
| 48 | cadmiwm | Cd | 
| 49 | indiwm | In | 
| 50 | tun | Sn | 
| 51 | antimoni | Sb | 
| 52 | telwriwm | Te | 
| 53 | ïodin | I | 
| 54 | xenon | Xe | 
| 55 | cesiwm | Cs | 
| 56 | bariwm | Ba | 
| 57 | lanthanwm | La | 
| 58 | ceriwm | Ce | 
| 59 | praseodymiwm | Pr | 
| 60 | neodymiwm | Nd | 
| 61 | promethiwm | Pm | 
| 62 | samariwm | Sm | 
| 63 | europiwm | Eu | 
| 64 | gadoliniwm | Gd | 
| 65 | terbiwm | Tb | 
| 66 | dysprosiwm | Dy | 
| 67 | holmiwm | Ho | 
| 68 | erbiwm | Er | 
| 69 | thuliwm | Tm | 
| 70 | yterbiwm | Yb | 
| 71 | lwtetiwm | Lu | 
| 72 | hafniwm | Hf | 
| 73 | tantalwm | Ta | 
| 74 | twngsten | W | 
| 75 | rheniwm | Re | 
| 76 | osmiwm | Os | 
| 77 | iridiwm | Ir | 
| 78 | platinwm | Pt | 
| 79 | aur | Au | 
| 80 | mercwri | Hg | 
| 81 | thaliwm | Tl | 
| 82 | plwm | Pb | 
| 83 | bismwth | Bi | 
| 84 | poloniwm | Po | 
| 85 | astatin | At | 
| 86 | radon | Rn | 
| 87 | ffransiwm | Fr | 
| 88 | radiwm | Ra | 
| 89 | actiniwm | Ac | 
| 90 | thoriwm | Th | 
| 91 | protactiniwm | Pa | 
| 92 | wraniwm | U | 
| 93 | neptwniwm | Np | 
| 94 | plwtoniwm | Pu | 
| 95 | americiwm | Am | 
| 96 | cwriwm | Cm | 
| 97 | berkeliwm | Bk | 
| 98 | californiwm | Cf | 
| 99 | einsteiniwm | Es | 
| 100 | fermiwm | Fm | 
| 101 | mendelefiwm | Md | 
| 102 | nobeliwm | No | 
| 103 | lawrenciwm | Lr | 
| 104 | rutherfordiwm | Rf |