Chemical Bond

Question 1

Resulting bond when two nonmetals combine

Answer 1

Covalent

Question 2

When metal (low electronegativity) and nonmetal (high electronegativity) combine, _____ compound is formed.

Answer 2

Ionic

Question 3

Attraction from sharing of electrons of atoms

Answer 3

Covalent

Question 4

Attraction from transfer of electrons

Answer 4

Ionic

Question 5

Attraction between electropositive atom and delocalized electrons within the metal lattice

Answer 5

Metallic bond

Question 6

In general a bond is more than 50% ionic in character if ∆EN between atom is atleast 1.7

Answer 6

Atoms form bond because the products are more stable than the isolated atoms

Question 7

Amount of energy involved in bond breaking and bon formation.

Answer 7

Bond energy

Question 8

The higher the bond energy, the stronger the bond.

Answer 8

The shorter the bond length the stronger the bond

Question 9

Species that contains atoms with an odd number of electrons, making them very reactive

Answer 9

Free radicals

Question 10

Resonance that obeys octet rule is preferred over one that have expanded octet with lower FC

Answer 10

In making lewis structure
1. Sum of valence electrons
2. Equate the number with the lewis structure
3. For ions, ALWAYS include the charges

Question 11

Importance of resonance structures, determined by Formal charges given by

Answer 11

FC=valence e- NBE - (BE/2)
Note. Counting backwards tip (valence-1)

Question 12

Resonance is more important when
1. Adjacent atoms do not have similar FC
2. Electronegative atom bears negative FC
3. Number of upaired electrons is consistent with magnetic property of species
4. Minimized FC

Answer 12

VSEPR: structure around atom is determined principally by minimizing electron repulsion, thus BE and NBE should be positioned as far as possible

Question 13

Molecular Geometry: Only considers arrangementof bonds, ignoring lone pairs

Answer 13

Electron Pair Geometry: considers arrangement of all electron pair

Question 14

Molecule only polar when it has net dipole (difference in electronegativity)

Answer 14

Intramolecular Forces: covalent, ionic bonds

Question 15

Intermolecular force forces of attraction (IMFA) responsible for physical properties of compounds including BP, MP,

Question 16

Relatively weak forces that exist among noble gas atoms and nonpolar molecules

Answer 16

LDF (vdW forces)

Question 17

Compounds that have higher BP, MO, and solubility in polar solvents have ____ interaction

Answer 17

Dipole-dipole forces

Question 18

Compounds that exhibit ____ have even higher BP, MP, and solubility in polar solvents

Answer 18

H-bonding

Question 19

IMFA that’s exhibited by all molecules

Answer 19

LDF (van der Waals)

Question 20

IMFA exhibited by polar molecules

Answer 20

Dipole-dipole

Question 21

IMFA exhibited by molecules with O-H, N-H, and H-F bond

Answer 21

Hydrogen bonding

Question 22

Discovered covalent bond, electron pairs and lewis structure

Answer 22

Gilbert Newton Lewis

Question 23

Studied molecular structure, polymer chemistry, x-ray analysis, electrolytic solution, NP in Chem 1936

Answer 23

Peter Debye

Question 24

Dipole moment can be used to distinguish between molecules that have the same formula but different structures

Answer 24

The higher the IMFA, the higher MP or BP

Question 25

For compounds with elements from same period, the higher the molar mass, the higher LDF, the higher BP

Answer 25

In terms of increasing relative strength
van der Waals
Dipole-dipole
Hydrogen bonding
Ion-ion