Metals have giant structures of atoms with delocalised electrons. This explains their high melting and boiling points and why they conduct electricity.
How are the particles bonded together in metals?
Attractive forces between atoms and delocalised electrons
Attractive forces between positive and negative ions
Which of these properties is typical of metals?
Low boiling point
Good conductor of electricity
Low melting point
Why are electrons in the outer shell of metal atoms free to move through the whole structure?
They have an overall charge
They are delocalised electrons
They have ions that can move
Which part of a metal is most important in transferring thermal energy?
Its delocalised electrons
How are the atoms arranged in a metal?
Why do metals have high melting points?
They have strong ionic bonds
They have strong covalent bonds
They have strong metallic bonds
Why can metals be bent and shaped?
Strong forces hold their atoms together
Their atoms are arranged in layers which slide over each other
Their atoms have a tetrahedral arrangement
What is an alloy?
A mixture of two or more elements, where at least one element is a metal
A mixture of three or more elements, where at least one element is a metal
A compound of two or more elements, where at least one element is a metal
Which of these statements about alloys is correct?
Most alloys are less useful than the individual elements that they are made from
Most alloys are softer than the individual elements that they are made from
Most alloys are harder than the individual elements that they are made from
Which of these materials is an alloy?