This makes me want to make an Excel worksheet with each element on a row, and columns for mono-atomic, 1-d single-atom filaments, and 2-d ___ene sheets. It wou

This makes me want to make an Excel worksheet with each element on a row, and columns for mono-atomic, 1-d single-atom filaments, and 2-d ___ene sheets. It would be interesting to research (Google) how many of them we can reliably make.