Question

when analyzing electron configurations, the stability of a particular main - group atom can be determined by its configuration. which orbital(s) must be full for an atom to be considered stable? a s only b p only c s or p d s and p which electron configuration is not a configuration of a stable main - group element?

Explanation:

For a main - group atom to be stable, its outermost s and p orbitals must be full. This is known as the octet rule (except for hydrogen and helium which follow the duet rule). The first question asks about the orbitals for stability, and the second question can be answered based on the knowledge of stable electron configurations. For the first question, a stable main - group atom has a full s and p orbital set in its outermost shell. For the second question, an electron configuration that does not follow the full - s and full - p outer - shell rule for main - group stability is not a stable configuration.

Answer:

For the first question: D. s and p
For the second question (assuming the options continue from the first part and we are looking for an unstable main - group configuration): Information about the options for the second question is incomplete, so only the answer to the first question is fully provided.