International Buyers – Please Note: Customs and brokerage fees, import duties and taxes are not included in the item price or shipping cost. These charges are your responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to buying. Avogadro’s Lab Supply Offered here are ten, supplemental carbon atoms for the 100 atom molecular model set. With it’s [He] 2s2 2p2 electron configuration, the black carbon atom can gain or lose electrons to achieve a stable octet. It has four holes for tetrahedral bonding. To view all the available atoms for the 100 atom set All merchandise offered by Avogadro’s Lab Supplyis New from the manufacturer! Don’t forget to visit my for great deals on all your lab supply needs!!!