Test 1

Question 1

In Covalent Bonding, electrons are:

Answer 1

Shared so that each atom has a noble gas configuration

Question 2

The Metallic bond is _______ and _______.

Answer 2

Nondirectional, Strong

Question 3

Describe the (100) plane

Answer 3

Front surface of cube

Question 4

APF of BCC

Answer 4

.68

Question 5

APF of FCC

Answer 5

.74

Question 6

APF of HCP

Answer 6

.74

Question 7

Describe an Edge Dislocation

Answer 7

Missing/ Extra Row

Question 8

What is a Vacancy?

Answer 8

Missing atom

Question 9

What is a Screw Dislocation?

Answer 9

Creates helical ramp

Question 10

What type of defect is a grain boundary?

Answer 10

Planar

Question 11

What atom is added during case hardening?

Answer 11

Carbon (Hydrocarbons)

Question 12

Conditions for interstitial solid solution

Answer 12

Dissimilar radius (Large difference)

Question 13

Conditions for substitutional solid solution

Answer 13

CEO 15

Question 14

Diffusion occurs most rapidly in a crystal when temperature is _______(low/high) and activation energy is ______ (low/high)

Answer 14

Temperature is high and activation energy is low

Question 15

Which atomic bonds is/are directional

Answer 15

Covalent

Question 16

What variables affect the attractive force between two ions?

Answer 16

Their Charges
Their Radii
(look at the formula)

Question 17

Which is a Planar defect?

a) Vacancy
b) inclusion
c) Grain Boundary
d) Edge Dislocation
e) Interstitialcy

Answer 17

c) Grain boundary

Vacancy, inclusion, and intersitialcy are point defects
Edge Dislocation is linear defect