I. a set of sp2 orbitals can be thought of as one s orbital one-third of the time and two p orbitals two-thirds of the time. ii. a set of sp orbitals can accommodate a maximum of six electrons. iii. the orbitals resulting from sp3d2 hybridization are directed toward the corners of an octahedron. iv. a set of sp3 orbitals results from the mixing of one s orbital and three p orbitals.

I. FALSE

II. FALSE

III. TRUE

IV. TRUE

Explanation:

I. A set of sp² orbitals can be thought of as one s orbital one-third of the time and two p orbitals two-thirds of the time. FALSE. 1 s orbital hybridize with 2 p orbitals to form 3 sp² permanent orbitals.

II. A set of sp orbitals can accommodate a maximum of six electrons. FALSE. sp orbitals, as any orbital, can accommodate a maximum of 2 electrons.

III. The orbitals resulting from sp³d² hybridization are directed toward the corners of an octahedron. TRUE. 1 s orbital, 3 p orbitals and 2 d orbitals hybridize to form 6 sp³d² orbitals, which are directed toward the corners of an octahedron.

IV. A set of sp³ orbitals results from the mixing of one s orbital and three p orbitals. TRUE. 1 s orbital hybridize with 3 p orbitals to form 4 sp³ orbitals.

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