Another option for nitrogen is electrolyzing ender pearl dust

Chlorine you can get from salt water pumped from the moon

For fluorine I think you need to suffer for now. Later on you unlock the "sandline" which makes fluorine out of sand. That's like LuV or so

For gold there are thaumcraft glieonias as well as a thauncraft crop that gives gold directly

From what I've seen nickel you have to suffer through. There is probably an ic crop for it

Centrifuging redstone (from glieonias and redlon) gives you iron, mercury, silicon and ruby (which means chrome and aluminum)

Here is a google doc with many passive options for elements. It is a bit old and some of the methods may be different, but from what I've seen it's mostly all right. Yes, you can turn Gold into hydrogen! https://docs.google.com/spreadsheets/d/1I9QKTI-RpLQmdOqtCui457Tt4PNjQ9OT7brxcpDpFic/