WorksheetsMetallic bonding
Total questions: 20
Worksheet time: 10mins
Metallic bonding is...
a type of covalent bond.
a type of ionic bond.
an attraction between positive ions and a sea of electrons.
Which statement best described the structure of a metal?
3D lattice of positive metal atoms surrounded by delocalised electrons.
3D lattice of positive metal ions surrounded by a sea of delocalised electrons.
2D lattice of metal atoms in neat rows.
3D lattice of metal ions of alternating charge
Electrons that are free to move in metals
delocalised electrons
oxidation number
chemical bond
salts
Properties of metallic compounds include:
brittle, conducts electricity (aqueous state), high melting points
usually gas or liquid, relatively low melting points, does not conduct electricity
shiny, malleable, ductile, conducts electricity, usually a solid
Why are metals malleable?
They are shiny
The electrons are held tightly within the lattice structure making it strong
The electrons are delocalised and are able to roll over each other into new positions without breaking the metallic bond.
The electrons are shared between two metal ions and this holds the atoms together
Why are metals ductile?
They are shiny
The electrons are held tightly within the lattice structure making it strong
The electrons are delocalised and are able to roll over each other into new positions without breaking the metallic bond.
The electrons are shared between two metal ions and this holds the atoms together
Why do metals conduct?
They are shiny
The electrons are held tightly within the lattice
The electrons are delocalised and able to move towards the positive terminal of a power source when connected in a circuit
The electrons are shared between two metal ions
Why do metallic compounds conduct electricity as solids?
core electrons are mobile, allowing electricity to flow through the metal
valence electrons are mobile, allowing electricity to flow through the metal
protons are mobile, allowing electricity to flow through the metal
the metal cations are mobile, allowing electricity to flow through the metal
Another word for shiny
Ductile
Sonorous
Malleable
Lustrous
Why are metals lustrous?
They have flat surfaces
The delocalised electrons at the surface of a metal reflect light
The light reflects off the cations of the lattice
Metals generate light
X is a solid at room temperature.
X has a high melting point.
Solid X conducts electricity.
Which diagram shows how the particles are arranged in solid X?
A mixture of two or more metals (or a metal and non-metal) is called a/an:
mixture
solution
compound
alloy
An alloy is harder than its pure metal because the foreign atoms in the alloy
increase the bond strength between the atoms.
increase the empty spaces between the atoms.
react with the pure metal atoms to form a compound.
reduce the ability of the atoms to slide across each other.
