Topic 9: Atomic and Molecular Interactions

Question 1

Negative potential energy denotes….

Answer 1

attractive force

Question 2

Positive potential energy denotes…..

Answer 2

repulsive force

Question 3

What is the equilibrium distance called? What is the corresponding negative energy called?

Answer 3

binding distance, binding energy

Question 4

What is the least amount of positive energy called that must be supplied to break a bond?

Answer 4

binding energy

Question 5

Describe atomic bonds

Answer 5

strong, primary, INTRAmolecular bonds, depends on electronegativity

Question 6

Describe a covalent bond

Answer 6

strongest bond- electron shared between atoms

Question 7

describe metallic bond

Answer 7

bond between metals, ions are positioned in a crystal lattice, bound together by a pool of delocalized electrons

Question 8

Describe ionic bonds

Answer 8

bond between a metal and a non-metal; one atom is positive the other is negative, attractive via Coloumb force

Question 9

What are the types of INTERmolecular interactions?

Answer 9

Vanderwaals, hydrogen bonds, hydrophobic interactions

Question 10

Describe Vanderwaal’s

Answer 10

between atoms without permanent dipole moment… weakest type of interaction

Question 11

Describe hydrogen bonds

Answer 11

hydrogen is bound to highly electronegative elements like F, O, N. seen in attractions between water molecules