Chemical substances or states can persist indefinitely even though they are not in their lowest energy state if they experience metastability - a state which is stable only if not disturbed too much.
Zat atau keadaan kimia dapat bertahan tanpa batas meskipun mereka tidak dalam keadaan energi terendah mereka jika mereka mengalami metastabilitas – keadaan yang stabil hanya jika tidak terlalu banyak terganggu.