4. Bond Properties & Ionic Bonding Model

Question 1

____ (2 words) is number of electron pairs

shared by a given pair of atoms.

Answer 1

Bond order

Question 2

____ (2 words) is energy needed to overcome attraction between nuclei and shared electrons. Higher, stronger

Answer 2

Bond energy

Question 3

____ (2 words) is the distance between the nuclei of the bonded atoms.

Answer 3

Bond length

Question 4

Higher bond order results in ____ bond length and higher bond energy.

Answer 4

Shorter

Question 5

Explain Harpoon Mechanism for KF.

1. At distance r*, electron ____ jumps ____ energy from ____ atom to ____ atom to produce ions.
2. Happens at distances much ____ than normal collisions.
3. Ions are attracted by ____ (2 words) to form compound.

Answer 5

1. Spontaneous, without, K, F
2. Greater
3. Coulombic interaction

Question 6

Coulombic interaction is the ____ of interaction between ____ ions.

Answer 6

Energy, two

Question 7

To convert coulombic interaction to kJ/mol, multiply result by ____ and divide by ____.

Answer 7

Avogadro’s constant - 6.02 x 10^23

1000

Question 8

Bond energy / Bond dissociation energy is defined as energy required to ____ apart bonded atoms into ____ atoms.

Answer 8

Pull, neutral

Question 9

Coulombic interaction is defined as energy required to ____ apart bonded atoms into ____.

Answer 9

Pull, ions