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              <h1>Periodic Table</h1>
<p>CSS Grid flag required to view in the traditional Periodic Table layout</p>
<ol class="periodic-table wrapper">
    <li data-element-group='nonmetal' data-group='1' data-period='1' class='element h '><h2> Hydrogen</h2><i> H </i></li><li data-element-group='noble-gas' data-group='18' data-period='1' class='element he '><h2> Helium</h2><i> He </i></li><li data-element-group='alkali-metal' data-group='1' data-period='2' class='element li '><h2> Lithium</h2><i> Li </i></li><li data-element-group='alkaline-earth-metal' data-group='2' data-period='2' class='element be '><h2> Beryllium</h2><i> Be </i></li><li data-element-group='metalloid' data-group='13' data-period='2' class='element b '><h2> Boron</h2><i> B </i></li><li data-element-group='nonmetal' data-group='14' data-period='2' class='element c '><h2> Carbon</h2><i> C </i></li><li data-element-group='nonmetal' data-group='15' data-period='2' class='element n '><h2> Nitrogen</h2><i> N </i></li><li data-element-group='nonmetal' data-group='16' data-period='2' class='element o '><h2> Oxygen</h2><i> O </i></li><li data-element-group='halogen' data-group='17' data-period='2' class='element f '><h2> Fluorine</h2><i> F </i></li><li data-element-group='noble-gas' data-group='18' data-period='2' class='element ne '><h2> Neon</h2><i> Ne </i></li><li data-element-group='alkali-metal' data-group='1' data-period='3' class='element na '><h2> Sodium</h2><i> Na </i></li><li data-element-group='alkaline-earth-metal' data-group='2' data-period='3' class='element mg '><h2> Magnesium</h2><i> Mg </i></li><li data-element-group='metal' data-group='13' data-period='3' class='element al '><h2> Aluminum</h2><i> Al </i></li><li data-element-group='metalloid' data-group='14' data-period='3' class='element si '><h2> Silicon</h2><i> Si </i></li><li data-element-group='nonmetal' data-group='15' data-period='3' class='element p '><h2> Phosphorus</h2><i> P </i></li><li data-element-group='nonmetal' data-group='16' data-period='3' class='element s '><h2> Sulfur</h2><i> S </i></li><li data-element-group='halogen' data-group='17' data-period='3' class='element cl '><h2> Chlorine</h2><i> Cl </i></li><li data-element-group='noble-gas' data-group='18' data-period='3' class='element ar '><h2> Argon</h2><i> Ar </i></li><li data-element-group='alkali-metal' data-group='1' data-period='4' class='element k '><h2> Potassium</h2><i> K </i></li><li data-element-group='alkaline-earth-metal' data-group='2' data-period='4' class='element ca '><h2> Calcium</h2><i> Ca </i></li><li data-element-group='transition-metal' data-group='3' data-period='4' class='element sc '><h2> Scandium</h2><i> Sc </i></li><li data-element-group='transition-metal' data-group='4' data-period='4' class='element ti '><h2> Titanium</h2><i> Ti </i></li><li data-element-group='transition-metal' data-group='5' data-period='4' class='element v '><h2> Vanadium</h2><i> V </i></li><li data-element-group='transition-metal' data-group='6' data-period='4' class='element cr '><h2> Chromium</h2><i> Cr </i></li><li data-element-group='transition-metal' data-group='7' data-period='4' class='element mn '><h2> Manganese</h2><i> Mn </i></li><li data-element-group='transition-metal' data-group='8' data-period='4' class='element fe '><h2> Iron</h2><i> Fe </i></li><li data-element-group='transition-metal' data-group='9' data-period='4' class='element co '><h2> Cobalt</h2><i> Co </i></li><li data-element-group='transition-metal' data-group='10' data-period='4' class='element ni '><h2> Nickel</h2><i> Ni </i></li><li data-element-group='transition-metal' data-group='11' data-period='4' class='element cu '><h2> Copper</h2><i> Cu </i></li><li data-element-group='transition-metal' data-group='12' data-period='4' class='element zn '><h2> Zinc</h2><i> Zn </i></li><li data-element-group='metal' data-group='13' data-period='4' class='element ga '><h2> Gallium</h2><i> Ga </i></li><li data-element-group='metalloid' data-group='14' data-period='4' class='element ge '><h2> Germanium</h2><i> Ge </i></li><li data-element-group='metalloid' data-group='15' data-period='4' class='element as '><h2> Arsenic</h2><i> As </i></li><li data-element-group='nonmetal' data-group='16' data-period='4' class='element se '><h2> Selenium</h2><i> Se </i></li><li data-element-group='halogen' data-group='17' data-period='4' class='element br '><h2> Bromine</h2><i> Br </i></li><li data-element-group='noble-gas' data-group='18' data-period='4' class='element kr '><h2> Krypton</h2><i> Kr </i></li><li data-element-group='alkali-metal' data-group='1' data-period='5' class='element rb '><h2> Rubidium</h2><i> Rb </i></li><li data-element-group='alkaline-earth-metal' data-group='2' data-period='5' class='element sr '><h2> Strontium</h2><i> Sr </i></li><li data-element-group='transition-metal' data-group='3' data-period='5' class='element y '><h2> Yttrium</h2><i> Y </i></li><li data-element-group='transition-metal' data-group='4' data-period='5' class='element zr '><h2> Zirconium</h2><i> Zr </i></li><li data-element-group='transition-metal' data-group='5' data-period='5' class='element nb '><h2> Niobium</h2><i> Nb </i></li><li data-element-group='transition-metal' data-group='6' data-period='5' class='element mo '><h2> Molybdenum</h2><i> Mo </i></li><li data-element-group='transition-metal' data-group='7' data-period='5' class='element tc '><h2> Technetium</h2><i> Tc </i></li><li data-element-group='transition-metal' data-group='8' data-period='5' class='element ru '><h2> Ruthenium</h2><i> Ru </i></li><li data-element-group='transition-metal' data-group='9' data-period='5' class='element rh '><h2> Rhodium</h2><i> Rh </i></li><li data-element-group='transition-metal' data-group='10' data-period='5' class='element pd '><h2> Palladium</h2><i> Pd </i></li><li data-element-group='transition-metal' data-group='11' data-period='5' class='element ag '><h2> Silver</h2><i> Ag </i></li><li data-element-group='transition-metal' data-group='12' data-period='5' class='element cd '><h2> Cadmium</h2><i> Cd </i></li><li data-element-group='metal' data-group='13' data-period='5' class='element in '><h2> Indium</h2><i> In </i></li><li data-element-group='metal' data-group='14' data-period='5' class='element sn '><h2> Tin</h2><i> Sn </i></li><li data-element-group='metalloid' data-group='15' data-period='5' class='element sb '><h2> Antimony</h2><i> Sb </i></li><li data-element-group='metalloid' data-group='16' data-period='5' class='element te '><h2> Tellurium</h2><i> Te </i></li><li data-element-group='halogen' data-group='17' data-period='5' class='element i '><h2> Iodine</h2><i> I </i></li><li data-element-group='noble-gas' data-group='18' data-period='5' class='element xe '><h2> Xenon</h2><i> Xe </i></li><li data-element-group='alkali-metal' data-group='1' data-period='6' class='element cs '><h2> Cesium</h2><i> Cs </i></li><li data-element-group='alkaline-earth-metal' data-group='2' data-period='6' class='element ba '><h2> Barium</h2><i> Ba </i></li><li data-element-group='lanthanoid' data-group='2' data-period='6' class='element la '><h2> Lanthanum</h2><i> La </i></li><li data-element-group='lanthanoid' data-group='3' data-period='6' class='element ce '><h2> Cerium</h2><i> Ce </i></li><li data-element-group='lanthanoid' data-group='4' data-period='6' class='element pr '><h2> Praseodymium</h2><i> Pr </i></li><li data-element-group='lanthanoid' data-group='5' data-period='6' class='element nd '><h2> Neodymium</h2><i> Nd </i></li><li data-element-group='lanthanoid' data-group='6' data-period='6' class='element pm '><h2> Promethium</h2><i> Pm </i></li><li data-element-group='lanthanoid' data-group='7' data-period='6' class='element sm '><h2> Samarium</h2><i> Sm </i></li><li data-element-group='lanthanoid' data-group='8' data-period='6' class='element eu '><h2> Europium</h2><i> Eu </i></li><li data-element-group='lanthanoid' data-group='9' data-period='6' class='element gd '><h2> Gadolinium</h2><i> Gd </i></li><li data-element-group='lanthanoid' data-group='10' data-period='6' class='element tb '><h2> Terbium</h2><i> Tb </i></li><li data-element-group='lanthanoid' data-group='11' data-period='6' class='element dy '><h2> Dysprosium</h2><i> Dy </i></li><li data-element-group='lanthanoid' data-group='12' data-period='6' class='element ho '><h2> Holmium</h2><i> Ho </i></li><li data-element-group='lanthanoid' data-group='13' data-period='6' class='element er '><h2> Erbium</h2><i> Er </i></li><li data-element-group='lanthanoid' data-group='14' data-period='6' class='element tm '><h2> Thulium</h2><i> Tm </i></li><li data-element-group='lanthanoid' data-group='15' data-period='6' class='element yb '><h2> Ytterbium</h2><i> Yb </i></li><li data-element-group='transition-metal' data-group='16' data-period='6' class='element lu '><h2> Lutetium</h2><i> Lu </i></li><li data-element-group='transition-metal' data-group='4' data-period='6' class='element hf '><h2> Hafnium</h2><i> Hf </i></li><li data-element-group='transition-metal' data-group='5' data-period='6' class='element ta '><h2> Tantalum</h2><i> Ta </i></li><li data-element-group='transition-metal' data-group='6' data-period='6' class='element w '><h2> Tungsten</h2><i> W </i></li><li data-element-group='transition-metal' data-group='7' data-period='6' class='element re '><h2> Rhenium</h2><i> Re </i></li><li data-element-group='transition-metal' data-group='8' data-period='6' class='element os '><h2> Osmium</h2><i> Os </i></li><li data-element-group='transition-metal' data-group='9' data-period='6' class='element ir '><h2> Iridium</h2><i> Ir </i></li><li data-element-group='transition-metal' data-group='10' data-period='6' class='element pt '><h2> Platinum</h2><i> Pt </i></li><li data-element-group='transition-metal' data-group='11' data-period='6' class='element au '><h2> Gold</h2><i> Au </i></li><li data-element-group='transition-metal' data-group='12' data-period='6' class='element hg '><h2> Mercury</h2><i> Hg </i></li><li data-element-group='metal' data-group='13' data-period='6' class='element tl '><h2> Thallium</h2><i> Tl </i></li><li data-element-group='metal' data-group='14' data-period='6' class='element pb '><h2> Lead</h2><i> Pb </i></li><li data-element-group='metal' data-group='15' data-period='6' class='element bi '><h2> Bismuth</h2><i> Bi </i></li><li data-element-group='metalloid' data-group='16' data-period='6' class='element po '><h2> Polonium</h2><i> Po </i></li><li data-element-group='halogen' data-group='17' data-period='6' class='element at '><h2> Astatine</h2><i> At </i></li><li data-element-group='noble-gas' data-group='18' data-period='6' class='element rn '><h2> Radon</h2><i> Rn </i></li><li data-element-group='alkali-metal' data-group='1' data-period='7' class='element fr '><h2> Francium</h2><i> Fr </i></li><li data-element-group='alkaline-earth-metal' data-group='2' data-period='7' class='element ra '><h2> Radium</h2><i> Ra </i></li><li data-element-group='actinoid' data-group='2' data-period='7' class='element ac '><h2> Actinium</h2><i> Ac </i></li><li data-element-group='actinoid' data-group='3' data-period='7' class='element th '><h2> Thorium</h2><i> Th </i></li><li data-element-group='actinoid' data-group='4' data-period='7' class='element pa '><h2> Protactinium</h2><i> Pa </i></li><li data-element-group='actinoid' data-group='5' data-period='7' class='element u '><h2> Uranium</h2><i> U </i></li><li data-element-group='actinoid' data-group='6' data-period='7' class='element np '><h2> Neptunium</h2><i> Np </i></li><li data-element-group='actinoid' data-group='7' data-period='7' class='element pu '><h2> Plutonium</h2><i> Pu </i></li><li data-element-group='actinoid' data-group='8' data-period='7' class='element am '><h2> Americium</h2><i> Am </i></li><li data-element-group='actinoid' data-group='9' data-period='7' class='element cm '><h2> Curium</h2><i> Cm </i></li><li data-element-group='actinoid' data-group='10' data-period='7' class='element bk '><h2> Berkelium</h2><i> Bk </i></li><li data-element-group='actinoid' data-group='11' data-period='7' class='element cf '><h2> Californium</h2><i> Cf </i></li><li data-element-group='actinoid' data-group='12' data-period='7' class='element es '><h2> Einsteinium</h2><i> Es </i></li><li data-element-group='actinoid' data-group='13' data-period='7' class='element fm '><h2> Fermium</h2><i> Fm </i></li><li data-element-group='actinoid' data-group='14' data-period='7' class='element md '><h2> Mendelevium</h2><i> Md </i></li><li data-element-group='actinoid' data-group='15' data-period='7' class='element no '><h2> Nobelium</h2><i> No </i></li><li data-element-group='transition-metal' data-group='16' data-period='7' class='element lr '><h2> Lawrencium</h2><i> Lr </i></li><li data-element-group='transition-metal' data-group='4' data-period='7' class='element rf '><h2> Rutherfordium</h2><i> Rf </i></li><li data-element-group='transition-metal' data-group='5' data-period='7' class='element db '><h2> Dubnium</h2><i> Db </i></li><li data-element-group='transition-metal' data-group='6' data-period='7' class='element sg '><h2> Seaborgium</h2><i> Sg </i></li><li data-element-group='transition-metal' data-group='7' data-period='7' class='element bh '><h2> Bohrium</h2><i> Bh </i></li><li data-element-group='transition-metal' data-group='8' data-period='7' class='element hs '><h2> Hassium</h2><i> Hs </i></li><li data-element-group='transition-metal' data-group='9' data-period='7' class='element mt '><h2> Meitnerium</h2><i> Mt </i></li><li data-element-group='transition-metal' data-group='10' data-period='7' class='element ds '><h2> Darmstadtium</h2><i> Ds </i></li><li data-element-group='transition-metal' data-group='11' data-period='7' class='element rg '><h2> Roentgenium</h2><i> Rg </i></li><li data-element-group='transition-metal' data-group='12' data-period='7' class='element cn '><h2> Copernicium</h2><i> Cn </i></li><li data-element-group='metal' data-group='13' data-period='7' class='element uut '><h2> Ununtrium</h2><i> Uut </i></li><li data-element-group='metal' data-group='14' data-period='7' class='element fl '><h2> Flerovium</h2><i> Fl </i></li><li data-element-group='halogen' data-group='15' data-period='7' class='element uup '><h2> Ununpentium</h2><i> Uup </i></li><li data-element-group='noble-gas' data-group='16' data-period='7' class='element lv '><h2> Livermorium</h2><i> Lv </i></li><li data-element-group='alkali-metal' data-group='17' data-period='7' class='element uus '><h2> Ununseptium</h2><i> Uus </i></li><li data-element-group='alkaline-earth-metal' data-group='18' data-period='7' class='element uuo '><h2> Ununoctium </h2><i> Uuo </i></li>
<div class="element lanthanoid" data-element-group="lanthanoid"></div>
<div class="element actinoid" data-element-group="actinoid"></div>


</ol>
            
          
!
            
              h2 {font-size: 0.5em;}

ol, li {
  margin: 0;
  padding: 0;
  float: none;
  list-style-type: none;
}

.element {
  background: #ccc;
  border: 1px solid #222;
  border-radius: 5px;
  text-align: center;
}

@supports (not(display: grid)) and (not(display:flex)){
  .element {float: left;
  min-width: 75px;
  min-height: 50px;
  margin: 3px;}
}

@supports (not(display: grid)) and (display:flex) {
  .wrapper {
    display:flex;
    flex-wrap: wrap;
  }
  .element {
    flex-grow: 1;
    flex-basis:75px;
    min-height: 50px;
    margin: 3px;
  }
  .lanthanoid, .actinoid {
    visibility:hidden;
  }
}

[data-element-group="non-metal"], [data-element-group="nonmetal"]{
  background-color: yellow;
}

[data-element-group="metal"]{

}

[data-element-group="halogen"] {
  background-color: coral;
}

[data-element-group="metalloid"] {
  background-color: #FF9999;
}

[data-element-group="metal"] {
  background-color: #FFCCCC;
}
[data-element-group="alkali-metal"] {
  background-color: #33CCFF;
}
[data-element-group="alkaline-earth-metal"] {
  background-color: #FFCC99;
}
[data-element-group="transition-metal"] {
  background-color: #66FF66;
}
[data-element-group="noble-gas"] {
  background-color: #FF99FF;
}
[data-element-group="lanthanoid"] {
  background-color: #99FFCC;
}
[data-element-group="actinoid"] {
  background-color: #33CCCC;
}

@supports (display: grid){
.wrapper {
  display: grid;
  grid-gap: 5px;
  grid-template-columns: repeat(18, 1fr);
  grid-template-rows: repeat(10, 50px);
  max-width: 1140px;
  margin:1em auto;
}

.actinoid {
  grid-column:3;
  grid-row:7;
}

.lanthanoid {
    grid-column:3;
    grid-row:6;
}


.feature-element {
  grid-column: 3/9;
  grid-row: 2/4;
  background: #eee;
}

.h{grid-column:1; grid-row:1;}
.he{grid-column:18; grid-row:1;}
.li{grid-column:1; grid-row:2;}
.be{grid-column:2; grid-row:2;}
.b{grid-column:13; grid-row:2;}
.c{grid-column:14; grid-row:2;}
.n{grid-column:15; grid-row:2;}
.o{grid-column:16; grid-row:2;}
.f{grid-column:17; grid-row:2;}
.ne{grid-column:18; grid-row:2;}
.na{grid-column:1; grid-row:3;}
.mg{grid-column:2; grid-row:3;}
.al{grid-column:13; grid-row:3;}
.si{grid-column:14; grid-row:3;}
.p{grid-column:15; grid-row:3;}
.s{grid-column:16; grid-row:3;}
.cl{grid-column:17; grid-row:3;}
.ar{grid-column:18; grid-row:3;}
.k{grid-column:1; grid-row:4;}
.ca{grid-column:2; grid-row:4;}
.sc{grid-column:3; grid-row:4;}
.ti{grid-column:4; grid-row:4;}
.v{grid-column:5; grid-row:4;}
.cr{grid-column:6; grid-row:4;}
.mn{grid-column:7; grid-row:4;}
.fe{grid-column:8; grid-row:4;}
.co{grid-column:9; grid-row:4;}
.ni{grid-column:10; grid-row:4;}
.cu{grid-column:11; grid-row:4;}
.zn{grid-column:12; grid-row:4;}
.ga{grid-column:13; grid-row:4;}
.ge{grid-column:14; grid-row:4;}
.as{grid-column:15; grid-row:4;}
.se{grid-column:16; grid-row:4;}
.br{grid-column:17; grid-row:4;}
.kr{grid-column:18; grid-row:4;}
.rb{grid-column:1; grid-row:5;}
.sr{grid-column:2; grid-row:5;}
.y{grid-column:3; grid-row:5;}
.zr{grid-column:4; grid-row:5;}
.nb{grid-column:5; grid-row:5;}
.mo{grid-column:6; grid-row:5;}
.tc{grid-column:7; grid-row:5;}
.ru{grid-column:8; grid-row:5;}
.rh{grid-column:9; grid-row:5;}
.pd{grid-column:10; grid-row:5;}
.ag{grid-column:11; grid-row:5;}
.cd{grid-column:12; grid-row:5;}
.in{grid-column:13; grid-row:5;}
.sn{grid-column:14; grid-row:5;}
.sb{grid-column:15; grid-row:5;}
.te{grid-column:16; grid-row:5;}
.i{grid-column:17; grid-row:5;}
.xe{grid-column:18; grid-row:5;}
.cs{grid-column:1; grid-row:6;}
.ba{grid-column:2; grid-row:6;}
.la{grid-column:2; grid-row:6;}
.ce{grid-column:3; grid-row:6;}
.pr{grid-column:4; grid-row:6;}
.nd{grid-column:5; grid-row:6;}
.pm{grid-column:6; grid-row:6;}
.sm{grid-column:7; grid-row:6;}
.eu{grid-column:8; grid-row:6;}
.gd{grid-column:9; grid-row:6;}
.tb{grid-column:10; grid-row:6;}
.dy{grid-column:11; grid-row:6;}
.ho{grid-column:12; grid-row:6;}
.er{grid-column:13; grid-row:6;}
.tm{grid-column:14; grid-row:6;}
.yb{grid-column:15; grid-row:6;}
.lu{grid-column:16; grid-row:6;}
.hf{grid-column:4; grid-row:6;}
.ta{grid-column:5; grid-row:6;}
.w{grid-column:6; grid-row:6;}
.re{grid-column:7; grid-row:6;}
.os{grid-column:8; grid-row:6;}
.ir{grid-column:9; grid-row:6;}
.pt{grid-column:10; grid-row:6;}
.au{grid-column:11; grid-row:6;}
.hg{grid-column:12; grid-row:6;}
.tl{grid-column:13; grid-row:6;}
.pb{grid-column:14; grid-row:6;}
.bi{grid-column:15; grid-row:6;}
.po{grid-column:16; grid-row:6;}
.at{grid-column:17; grid-row:6;}
.rn{grid-column:18; grid-row:6;}
.fr{grid-column:1; grid-row:7;}
.ra{grid-column:2; grid-row:7;}
.ac{grid-column:2; grid-row:7;}
.th{grid-column:3; grid-row:7;}
.pa{grid-column:4; grid-row:7;}
.u{grid-column:5; grid-row:7;}
.np{grid-column:6; grid-row:7;}
.pu{grid-column:7; grid-row:7;}
.am{grid-column:8; grid-row:7;}
.cm{grid-column:9; grid-row:7;}
.bk{grid-column:10; grid-row:7;}
.cf{grid-column:11; grid-row:7;}
.es{grid-column:12; grid-row:7;}
.fm{grid-column:13; grid-row:7;}
.md{grid-column:14; grid-row:7;}
.no{grid-column:15; grid-row:7;}
.lr{grid-column:16; grid-row:7;}
.rf{grid-column:4; grid-row:7;}
.db{grid-column:5; grid-row:7;}
.sg{grid-column:6; grid-row:7;}
.bh{grid-column:7; grid-row:7;}
.hs{grid-column:8; grid-row:7;}
.mt{grid-column:9; grid-row:7;}
.ds{grid-column:10; grid-row:7;}
.rg{grid-column:11; grid-row:7;}
.cn{grid-column:12; grid-row:7;}
.uut{grid-column:13; grid-row:7;}
.fl{grid-column:14; grid-row:7;}
.uup{grid-column:15; grid-row:7;}
.lv{grid-column:16; grid-row:7;}
.uus{grid-column:17; grid-row:7;}
.uuo{grid-column:18; grid-row:7;}
.la{grid-column:2; grid-row:8;}
.ce{grid-column:3; grid-row:8;}
.pr{grid-column:4; grid-row:8;}
.nd{grid-column:5; grid-row:8;}
.pm{grid-column:6; grid-row:8;}
.sm{grid-column:7; grid-row:8;}
.eu{grid-column:8; grid-row:8;}
.gd{grid-column:9; grid-row:8;}
.tb{grid-column:10; grid-row:8;}
.dy{grid-column:11; grid-row:8;}
.ho{grid-column:12; grid-row:8;}
.er{grid-column:13; grid-row:8;}
.tm{grid-column:14; grid-row:8;}
.yb{grid-column:15; grid-row:8;}
.ac{grid-column:2; grid-row:9;}
.th{grid-column:3; grid-row:9;}
.pa{grid-column:4; grid-row:9;}
.u{grid-column:5; grid-row:9;}
.np{grid-column:6; grid-row:9;}
.pu{grid-column:7; grid-row:9;}
.am{grid-column:8; grid-row:9;}
.cm{grid-column:9; grid-row:9;}
.bk{grid-column:10; grid-row:9;}
.cf{grid-column:11; grid-row:9;}
.es{grid-column:12; grid-row:9;}
.fm{grid-column:13; grid-row:9;}
.md{grid-column:14; grid-row:9;}
.no{grid-column:15; grid-row:9;}
}
            
          
!
            
              // Details of the process can be found at https://responsivedesign.is/articles/creating-the-periodic-table-with-grid-css


            
          
!
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