Question

select the electron groupings that result in a linear molecule?
-e-
-e-
-:e:
-e≡
-e-
=e=
-:e-
-:e=
-e=

Explanation:

• For a molecule to be linear, the central atom (\(E\)) should have no lone pairs (or if there are lone pairs, they should be arranged in a way that the overall shape is linear).
• In the structure \(-E-\), the central atom \(E\) has two bonding pairs and no lone pairs. According to VSEPR (Valence - Shell Electron - Pair Repulsion) theory, two electron groups (bonding pairs) around a central atom result in a linear geometry (\(180^{\circ}\) bond angle).
• In the structure \(-E\equiv\), the central atom \(E\) has two electron groups (one single - bond and one triple - bond, which count as two electron groups). VSEPR theory predicts a linear geometry for two electron groups around a central atom.

Answer:

\(-E-\), \(-E\equiv\)