! Periode

|-

| style="text-align:center; background-color:yellow; border:1px solid black;" | [[1|1<br /><small>Wasserstoff</small><br />H]]

| colspan="3" |

| style="text-align:center; background-color:yellow; border:1px solid black;" | [[2|2<br /><small>Helium</small><br />He]]

|-

| style="text-align:center; background-color:silver; border:1px solid black;" | [[3|3<br /><small>Lithium</small><br />Li]]

| style="text-align:center; background-color:silver; border:1px solid black;" | [[4|4<br /><small>Beryllium</small><br />Be]]

| style="text-align:center; background-color:yellow; border:1px solid black;" | [[10|10<br /><small>Neon</small><br />Ne]]

|-

| style="text-align:center; background-color:silver; border:1px solid black;" | [[11|11<br /><small>Natrium</small><br />Na]]

| style="text-align:center; background-color:silver; border:1px solid black;" | [[12|12<br /><small>Magnesium</small><br />Mg]]

| style="text-align:center; background-color:yellow; border:1px solid black;" | [[18|18<br /><small>Argon</small><br />Ar]]

|-

| style="text-align:center; background-color:silver; border:1px solid black;" | [[19|19<br /><small>Kalium</small><br />K]]

| style="text-align:center; background-color:silver; border:1px solid black;" | [[20|20<br /><small>Calcium</small><br />Ca]]

| style="text-align:center; background-color:yellow; border:1px solid black;" | [[36|36<br /><small>Krypton</small><br />Kr]]

|-

| style="text-align:center; background-color:silver; border:1px solid black;" | [[37|37<br /><small>Rubidium</small><br />Rb]]

| style="text-align:center; background-color:silver; border:1px solid black;" | [[38|38<br /><small>Strontium</small><br />Sr]]

| style="text-align:center; background-color:yellow; border:1px solid black;" | [[54|54<br /><small>Xenon</small><br />Xe]]

|-

| style="text-align:center; background-color:silver; border:1px solid black;" | [[55|55<br /><small>Cäsium</small><br />Cs]]

| style="text-align:center; background-color:silver; border:1px solid black;" | [[56|56<br /><small>Barium</small><br />Ba]]

| style="text-align:center; background-color:yellow; border:1px solid black;" | [[86|86<br /><small>Radon</small><br />Rn]]

|-

| style="text-align:center; background-color:silver; border:1px solid black;" | [[87|87<br /><small>Francium</small><br />Fr]]

| style="text-align:center; background-color:silver; border:1px solid black;" | [[88|88<br /><small>Radium</small><br />Ra]]