Question

question 7 (1 point) which 2 isotopes appear in nature? a lithium-6 b lithium-7 c lithium-8 d lithium-5

Explanation:

Naturally - occurring isotopes of lithium are lithium - 6 and lithium - 7. Lithium - 8 and lithium - 5 are not stable and do not occur naturally in significant amounts.

Answer:

A. Lithium - 6, B. Lithium - 7