Input interpretation
period 2 elements | CAS number
Table
lithium | 7439-93-2 beryllium | 7440-41-7 boron | 7440-42-8 carbon | 7440-44-0 nitrogen | 7727-37-9 oxygen | 7782-44-7 fluorine | 7782-41-4 neon | 7440-01-9