metals and alloys

Question 1

metals consist of a _____ structure?

Answer 1

metals consist of a giant structure

Question 2

electrons in the outer shell of metal atoms are ______?

Answer 2

electrons in the outer shell of metal atoms are delocalised

Question 3

there are strong _______ forces between positive metal ions and shared negative electrons?

Answer 3

there are strong electrostatic forces between positive metal ions and shared negative electrons

Question 4

why do metals have high melting and boiling points?

Answer 4

because a lot of energy is needed to break the strong metallic bonds

Question 5

why are metals good conductors of heat and electricity?

Answer 5

because they have delocalised electrons

Question 6

why can metals be bent and shaped?

Answer 6

because the layers of metal can slide over eachother

Question 7

why might the fact that metals can be bent be a problem?

Answer 7

because some metals are not hard enough to be useful

Question 8

in order to make metals harder, what do we do?

Answer 8

make an alloy, which is a mixture of metals

Question 9

in an alloy, the different sizes of the atoms distorts the layers, what is the effect of this?

Answer 9

makes it difficult for the layers to slide over eachother, making alloys harder than metals