NEW
Font size
WorksheetsREVIEW
Total questions: 16
Worksheet time: 28mins
Which statement correctly describes an ionic compound?
It is made of atoms that share electrons.
It is made of positive and negative ions held together by strong electrostatic forces.
It is made of molecules held by weak forces.
It is made of neutral atoms with no charge.
What holds the ions together in a giant ionic lattice such as sodium chloride?
Weak forces between molecules
Sharing of electrons between atoms
Strong forces between positive and negative ions
Attraction between neutral atoms
What are the melting point and boiling point of ionic compounds?
High melting point but low boiling point
Low melting point but high boiling point
Both low, because the forces between particles are weak
Both high, because the ions are held by strong electrostatic forces
What is the electrical conductivity of ionic compounds in the solid and molten states?
Conduct in both solid and molten states
Conduct only when solid, not when molten
Conduct only when molten, not when solid
Do not conduct in either state
What is a covalent bond?
A bond formed by the transfer of electrons from one atom to another
A bond formed when a pair of electrons is shared between two atoms
A bond formed by strong attraction between positive and negative ions
A bond formed between metal atoms only
Which statement correctly describes a simple molecular substance?
It has strong bonds between positive and negative ions.
It has weak forces between molecules and no mobile ions or electrons.
It has a giant structure with delocalised electrons.
It conducts electricity because electrons can move freely.
What are the melting and boiling points of simple molecular substances?
Both low, because they have weak forces between molecules
High melting point but low boiling point
Low melting point but high boiling point
Both high, because they have strong forces between molecules
What is the electrical conductivity of simple molecular substances?
They conduct only when solid
They conduct only when molten
They do not conduct electricity in any state
They conduct electricity in all states
What are the melting and boiling points of giant molecular (giant covalent) substances?
High melting point but low boiling point
Both high, because atoms are joined by strong covalent bonds
Low melting point but high boiling point
Both low, because molecules are easily separated
What is the electrical conductivity of giant molecular substances?
None of them conduct electricity in any state
They only conduct when melted
All giant molecular substances conduct electricity well
Most do not conduct, but graphite does because it has free electrons
Why are ionic substances strong but brittle?
The ions share electrons, so the structure bends easily without breaking.
The ions are joined by weak forces and can move easily.
The ions form molecules that can slide over each other.
The ions are held by strong forces, but when layers shift, like charges repel and the crystal breaks.
What type of bonding is present in MgCl2?
Ionic bond
Single covalent bond
Double covalent bond
Triple covalent bond
The bonding in CO₂ can be described as....
Ionic bond
Single covalent bond
Double covalent bond
Triple covalent bond
The bonding in CH₄ (methane) can be described as....
Ionic bond
Single covalent bond
Double covalent bond
Triple covalent bond
What type of bond is found between atoms in MgO?
Ionic bond
Single covalent bond
Double covalent bond
Triple covalent bond
In which compound are three pairs of electrons shared between two atoms?
H₂
N₂
CO₂
CH₄
