| a href="/encyclopedia/Periodic-table-group" title="Periodic table group">Group → | 1 | 2 | | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| a href="/encyclopedia/Periodic-table-period" title="Periodic table period">Period ↓ | colspan="20"| |
| a href="/encyclopedia/Period-1-element" title="Period 1 element">1 | style="text-align:center;background-color:#a0ffa0;color:red;border:1px solid black;"|1 H | colspan="17"|
| style="text-align:center;background-color:#c0ffff;color:red;border:1px solid black;"|2 He |
| a href="/encyclopedia/Period-2-element" title="Period 2 element">2 | style="text-align:center;background-color:#ff6666;color:black;border:1px solid black;"|3 Li | style="text-align:center;background-color:#ffdead;color:black;border:1px solid black;"|4 Be | colspan="11"|
| style="text-align:center;background-color:#cccc99;color:black;border:1px solid black;"|5 B | style="text-align:center;background-color:#a0ffa0;color:black;border:1px solid black;"|6 C | style="text-align:center;background-color:#a0ffa0;color:red;border:1px solid black;"|7 N | style="text-align:center;background-color:#a0ffa0;color:red;border:1px solid black;"|8 O | style="text-align:center;background-color:#ffff99;color:red;border:1px solid black;"|9 F | style="text-align:center;background-color:#c0ffff;color:red;border:1px solid black;"|10 Ne |
| a href="/encyclopedia/Period-3-element" title="Period 3 element">3 | style="text-align:center;background-color:#ff6666;color:black;border:1px solid black;"|11 Na | style="text-align:center;background-color:#ffdead;color:black;border:1px solid black;"|12 Mg | colspan="11"|
| style="text-align:center;background-color:#cccccc;color:black;border:1px solid black;"|13 Al | style="text-align:center;background-color:#cccc99;color:black;border:1px solid black;"|14 Si | style="text-align:center;background-color:#a0ffa0;color:black;border:1px solid black;"|15 P | style="text-align:center;background-color:#a0ffa0;color:black;border:1px solid black;"|16 S | style="text-align:center;background-color:#ffff99;color:red;border:1px solid black;"|17 Cl | style="text-align:center;background-color:#c0ffff;color:red;border:1px solid black;"|18 Ar |
| a href="/encyclopedia/Period-4-element" title="Period 4 element">4 | style="text-align:center;background-color:#ff6666;color:black;border:1px solid black;"|19 K | style="text-align:center;background-color:#ffdead;color:black;border:1px solid black;"|20 Ca |
| style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|21 Sc | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|22 Ti | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|23 V | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|24 Cr | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|25 Mn | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|26 Fe | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|27 Co | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|28 Ni | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|29 Cu | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|30 Zn | style="text-align:center;background-color:#cccccc;color:black;border:1px solid black;"|31 Ga | style="text-align:center;background-color:#cccc99;color:black;border:1px solid black;"|32 Ge | style="text-align:center;background-color:#cccc99;color:black;border:1px solid black;"|33 As | style="text-align:center;background-color:#a0ffa0;color:black;border:1px solid black;"|34 Se | style="text-align:center;background-color:#ffff99;color:green;border:1px solid black;"|35 Br | style="text-align:center;background-color:#c0ffff;color:red;border:1px solid black;"|36 Kr |
| a href="/encyclopedia/Period-5-element" title="Period 5 element">5 | style="text-align:center;background-color:#ff6666;color:black;border:1px solid black;"|37 Rb | style="text-align:center;background-color:#ffdead;color:black;border:1px solid black;"|38 Sr |
| style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|39 Y | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|40 Zr | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|41 Nb | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|42 Mo | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dashed black;"|43 Tc | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|44 Ru | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|45 Rh | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|46 Pd | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|47 Ag | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|48 Cd | style="text-align:center;background-color:#cccccc;color:black;border:1px solid black;"|49 In | style="text-align:center;background-color:#cccccc;color:black;border:1px solid black;"|50 Sn | style="text-align:center;background-color:#cccc99;color:black;border:1px solid black;"|51 Sb | style="text-align:center;background-color:#cccc99;color:black;border:1px solid black;"|52 Te | style="text-align:center;background-color:#ffff99;color:black;border:1px solid black;"|53 I | style="text-align:center;background-color:#c0ffff;color:red;border:1px solid black;"|54 Xe |
| a href="/encyclopedia/Period-6-element" title="Period 6 element">6 | style="text-align:center;background-color:#ff6666;color:black;border:1px solid black;"|55 Cs | style="text-align:center;background-color:#ffdead;color:black;border:1px solid black;"|56 Ba | style="vertical-align: top; text-align:center;background-color:#ffbfff;"|*
| style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|71 Lu | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|72 Hf | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|73 Ta | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|74 W | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|75 Re | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|76 Os | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|77 Ir | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|78 Pt | style="text-align:center;background-color:#ffc0c0;color:black;border:1px solid black;"|79 Au | style="text-align:center;background-color:#ffc0c0;color:green;border:1px solid black;"|80 Hg | style="text-align:center;background-color:#cccccc;color:black;border:1px solid black;"|81 Tl | style="text-align:center;background-color:#cccccc;color:black;border:1px solid black;"|82 Pb | style="text-align:center;background-color:#cccccc;color:black;border:1px solid black;"|83 Bi | style="text-align:center;background-color:#cccc99;color:black;border:1px dashed black;"|84 Po | style="text-align:center;background-color:#ffff99;color:black;border:1px dashed black;"|85 At | style="text-align:center;background-color:#c0ffff;color:red;border:1px dashed black;"|86 Rn |
| a href="/encyclopedia/Period-7-element" title="Period 7 element">7 | style="text-align:center;background-color:#ff6666;color:black;border:1px dashed black;"|87 Fr | style="text-align:center;background-color:#ffdead;color:black;border:1px dashed black;"|88 Ra | style="vertical-align: top; text-align:center;background-color:#ff99cc;"|**
| style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|103 Lr | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|104 Rf | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|105 Db | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|106 Sg | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|107 Bh | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|108 Hs | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|109 Mt | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|110 Ds | style="text-align:center;background-color:#ffc0c0;color:black;border:1px dotted black;"|111 Rg | style="text-align:center;background-color:#ffc0c0;color:green;border:1px dotted black;"|112 Uub | style="text-align:center;background-color:#cccccc;color:black;border:1px dotted black;"|113 Uut | style="text-align:center;background-color:#cccccc;color:black;border:1px dotted black;"|114 Uuq | style="text-align:center;background-color:#cccccc;color:black;border:1px dotted black;"|115 Uup | style="text-align:center;background-color:#cccccc;color:black;border:1px dotted black;"|116 Uuh | style="text-align:center;background-color:#fcfecc;color:#cccccc;"|117 Uus | style="text-align:center;background-color:#ecfefc;color:#cccccc;"|118 Uuo |
olspan="21"| |
| olspan="4" style="text-align:right"|* Lanthanides | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|57 La | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|58 Ce | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|59 Pr | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|60 Nd | style="text-align:center;background-color:#ffbfff;color:black;border:1px dashed black;"|61 Pm | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|62 Sm | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|63 Eu | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|64 Gd | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|65 Tb | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|66 Dy | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|67 Ho | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|68 Er | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|69 Tm | style="text-align:center;background-color:#ffbfff;color:black;border:1px solid black;"|70 Yb |
| olspan="4" style="text-align:right"|** Actinides | style="text-align:center;background-color:#ff99cc;color:black;border:1px dashed black;"|89 Ac | style="text-align:center;background-color:#ff99cc;color:black;border:1px solid black;"|90 Th | style="text-align:center;background-color:#ff99cc;color:black;border:1px dashed black;"|91 Pa | style="text-align:center;background-color:#ff99cc;color:black;border:1px solid black;"|92 U | style="text-align:center;background-color:#ff99cc;color:black;border:1px dashed black;"|93 Np | style="text-align:center;background-color:#ff99cc;color:black;border:1px solid black;"|94 Pu | style="text-align:center;background-color:#ff99cc;color:black;border:1px dotted black;"|95 Am | style="text-align:center;background-color:#ff99cc;color:black;border:1px dotted black;"|96 Cm | style="text-align:center;background-color:#ff99cc;color:black;border:1px dotted black;"|97 Bk | style="text-align:center;background-color:#ff99cc;color:black;border:1px dashed black;"|98 Cf | style="text-align:center;background-color:#ff99cc;color:black;border:1px dotted black;"|99 Es | style="text-align:center;background-color:#ff99cc;color:black;border:1px dotted black;"|100 Fm | style="text-align:center;background-color:#ff99cc;color:black;border:1px dotted black;"|101 Md | style="text-align:center;background-color:#ff99cc;color:black;border:1px dotted black;"|102 No |