JS HTML table skip <td>

Hi, I’m trying to make an html periodic table, but I didn’t want to waste time having to type in the atomic number of each element.
here is my code [https://jsfiddle.net/mqvwh3st/2/#&togetherjs=a7uumzoTV4]

I can’t find a way to skip the 57-71 box and the 89-103 box (ie not put a number.)

Not sure what it is you are asking, here. Can you better describe your problem and objective?

In your markup there are a lot of <small></small> empty elements. Suggest either populate them with data or remove them and style the font-size in the CSS.