Underwater TNT is a block that the player can use to initiate a controlled explosion underwater. Underwater TNT can be instantly broken with any tool or hand, and can also be activated like a normal block. Underwater TNT can be obtained by crafting regular TNT and Sodium - a block that serves as an integral part of chemistry. Elements and isotopes are mainly obtained by constructing them in the element constructor. The Minecraft cursor and game pointer with Underwater TNT and Sodium!