Oh sorry I see what you’re saying. Yes, in the traditional layout the row corresponds to the highest principal quantum number n (the “number of shells”). But that’s a sort of arbitrary piece of information? Subshells actually fill up in order of n + l, so if anything it is more useful to group elements by that quantity, which is what the Janet form does.
Then, if you want to read an element’s electronic structure from the table, you can apply a slightly simpler pattern as shown on the left in this image. Though, again, I’m not sure this sort of thing is helping anyone grok chemistry, especially in high school.
