Question

From the Lewis structures of the species given, pick all of those in which the central atom obeys the octet rule. A.None of the Above B.Some of the Above C.All of the Above

Answer 1

The correct answer is option B.

The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a stable electron configuration with eight electrons in their outermost shell (except for hydrogen, which only needs two electrons).

To determine which Lewis structures obey the octet rule, we need to examine each species:

1. Molecules with central atoms from Group 1 (e.g., Li, Na, K) and Group 2 (e.g., Be, Mg) typically do not obey the octet rule because they have fewer than eight valence electrons.

2. Molecules with central atoms from Groups 13 to 18 (e.g., C, N, O, F, Cl) can obey the octet rule. Elements from these groups often share, gain, or lose electrons to attain eight valence electrons.

So, the answer is B. Some of the Above, as it depends on the specific elements involved in each Lewis structure.