noble-gas public under chemical-element 188 List Picture As a command %3 n0 noble-gas n2 argon n0->n2 n3 helium n0->n3 n4 krypton n0->n4 n5 neon n0->n5 n6 radon n0->n6 n7 xenon n0->n7 n1 chemical-element n1->n0