C10

Question 1

describe metallic bonding (2)

Answer 1

lattice of positive metal ions in a sea of delocalized electrons

Question 2

describe general physical properties of metal (4)

Answer 2

high melting and boiling points, malleable, ductile, good conductors of heat and electricity

Question 3

define malleable (1)

Answer 3

can be hammered or bent into shape

Question 4

define ductile (1)

Answer 4

can be drawn into wires

Question 5

define an alloy (1)

Answer 5

a mixtures of a metal with another substance

Question 6

explain why an alloy is more useful then the pure metal (3)

Answer 6

it is harder (more difficult to scratch) because the other element disrupts the lattice structure and makes it more difficult to remove the layers from the metal

Question 7

what is brass (1)

Answer 7

an alloy of copper and zinc

Question 8

what do we call an alloy that contains irons and other substances (1)

Answer 8

steel

Question 9

why is nickel and chromium alloyed with iron? (2)

Answer 9

chromium prevents steel from rusting, nickel makes it harder

Question 10

place in order of reactivity the following elements: Al, C, Ca, Cu, Fe, H2, K, Mg, Na, Zn (1)

Answer 10

K, Na, Ca, Mg, Al, C, Zn, Fe, H2, Cu