Crossword clues for Form of carbon 4 lettersAnswerClueSOOTForm of carbonCOALForm of carbonWATERWhat carbon dioxide reacts with to form carbonic acidNANOTUBETeeny pipe formed by carbon atomsMARCarbonic ___ (compound formed in soda)ISOTOPESElemental forms used in carbon datingSODAASHSodium carbonate in powder form