FLORES CHEM 1411 CH 8

The Lewis structure of N₂H₂ shows ________.

• a nitrogen-nitrogen triple bond

• a nitrogen-nitrogen single bond

• each nitrogen has one nonbonding electron pair

• each nitrogen has two nonbonding electron pairs

The Lewis structure of the CO₃^2- ion is ________.

• 
• 
• 
• 

Resonance structures differ by ________.

• number of electrons only

• placement of atoms only

• number of atoms only

• placement of electrons only

Of the bonds C-C, CC, and C≡C, the C-C bond is ________.

• strongest/shortest

• strongest/longest

• weakest/longest

• weakest/shortest

Based on the octet rule, aluminum most likely forms an ________ ion.

• Al³⁺

• Al⁴⁺

• Al^4-

• Al⁺

The electron configuration of the phosphide ion (P^3-) is ________.

• [Ne]3s²3p¹

• [Ne]3s²3p³

• [Ne]3p²

• [Ne]3s²3p⁶

For a given arrangement of ions, the lattice energy decreases as ionic radius ________ and as ionic charge ________.

• decreases, increases

• increases, decreases

• increases, increases

• decreases, decreases

How many equivalent resonance forms can be drawn for the nitrate ion?

• 0

• 2

• 3

• 4

Using the table of bond energies, the ΔH for the reaction is _____ kJ.

• +160

• -160

• -217

• -63

• C----H

• N----H

• O----H

• O----C