Lecture 1

Question 1

Cations are ____ and are formed by elements on the ____ side of the periodic chart.

Answer 1

Positive; Left

Question 2

Anions are ____ and are formed by elements on the ____ side of the periodic chart.

Answer 2

Negative; Right

Question 3

Ionic compounds are between ____ and ____.

Answer 3

Metals; Non-metals

Question 4

Molecular compounds are between ____.

Answer 4

Only non-metals

Question 5

In an ionic compound: The ionic bond is created by interaction between ____-____ ions.

Answer 5

Oppositely-charged

Question 6

A molecular (or _____) compound is a ____ substance. The bonds between atoms are ____, where electrons are ____.

Answer 6

Covalent; Pure; Covalent; Shared

Question 7

Ideal Gas Law

Answer 7

PV=nRT

Question 8

Molecules can have polar bonds due to the differences in ____ of bonded atoms.

Answer 8

Electronegativity

Question 9

Intramolecular bonds are strong:
1. Covalent = ____-____ kJ/mol
2. Ionic = ____-____ kJ/mol

Answer 9

1. 100-400 kJ/mol
2. 700-1100 kJ/mol

Question 10

____: The forces holding atoms together to form molecules (____ bonds, ____ bonds).

Answer 10

Intramolecular forces; Covalent; Ionic

Question 11

____: The weak electrostatic interactions between molecules.

Answer 11

Intermolecular forces

Question 12

Intermolecular forces are directly related to ____, ____, and energy needed to convert ____ to ____ or ____ to ____.

Answer 12

Melting point; Boiling point; Solid to liquid; Liquid to vapor

Question 13

Intermolecular forces: important in determining ____ of gases, liquids, and solids in various ____.

Answer 13

Solubility; Solvents

Question 14

____ ____: Crucial in determining structures of biologically important molecules.

Answer 14

Intermolecular forces

Question 15

Salts (____ compounds) are more soluble in ____ solvents (like ____),

Answer 15

Ionic; Polar; Water