Materials

Question 1

Ionic

Answer 1

Bond between two atoms in a molecule in which an electron is transferred from one atom to another

Question 2

covalent

Answer 2

Bond between two atoms in a molecule in which electrons in outer orbits are shared by atoms

Question 3

metallic

Answer 3

Bond between many atoms in which available electrons are shared by all atoms in contact

Question 4

Van der Waals

Answer 4

Bonds are not classified under primary bonds

Question 5

polymorphism

Answer 5

Appearance of more than one type of crystal structure for a given metal at different temperatures

Question 6

cold working

Answer 6

Plastic deformation of a metal at a temperatures less than 30% of the metal’s melting point

Question 7

anisotrophy

Answer 7

Material exhibits different mechanical properties in different directions

Question 8

nucleation

Answer 8

Initial formation of a new crystal at a random locations in a molten metal that is being cooled

Question 9

recovery

Answer 9

Annealing stage during which the stresses in highly deformed portions of a metal piece are relived

Question 10

rerystallization

Answer 10

Annealing stage during which new grains are formed which replace older grains