Chapter 2

Question 1

Which 4 properties are affected by atomic structure?

Answer 1

1. Chemical
2. Electrical
3. Thermal
4. Optical

Question 2

Electrons have discrete energy values and tend to occupy highest available energy states. (T or F)

Answer 2

False, lowest available

Question 3

valence electrons

Answer 3

those in outer unfilled shells which participate in interatomic bonding

Question 4

atomic number

Answer 4

of protons in nucleus of atom

Question 5

Filled shells are more stable and require more energy to gain or lose electrons. (T or F)

Answer 5

True

Question 6

Elements in each column have…

Answer 6

similar valence electron structure.

Question 7

Electronegative elements (larger number) readily gain electrons. (T or F)

Answer 7

True

Question 8

Ionic bonding requires what?

Answer 8

electron transfer

Question 9

covalent bonding

Answer 9

atoms or molecules share electrons

Question 10

metallic bonding

Answer 10

electrons delocalized to form an “electron cloud”

Question 11

secondary bonding

Answer 11

arises from attractive forces between dipoles

Question 12

net energy

Answer 12

sum of attractive and repulsive energies

Question 13

The lower bonding energy means the higher the melting temperature. (T or F)

Answer 13

False, the higher binding energy

Question 14

The smaller bonding energy means the larger the coefficient of Thermal Expansion. (T or F)

Answer 14

True

Question 15

Match bond energy to materials (3)

Answer 15

1. Ceramics - Large
2. Metals - Variable
3. Polymers - Weak