WorksheetsC2 - Structure and Bonding
Total questions: 14
Worksheet time: 10mins
Complete the sentence: In covalent bonds, electrons are _______________________
Lost
Gained
Halved
Shared
What is the name given to the structure of diamond, graphite and silicon dioxide?
Mega covalent structure
Mega ionic lattice
Giant covalent
Giant ionic
How many bonds does each carbon have in diamond?
2
4
6
8
Explain why diamond has a high melting point
Giant structure, strong covalent bonds between the atoms, requires a lot of energy to break
Giant structure, weak covalent bonds between the atoms, requires little energy to break
Mega structure, strong covalent bonds between the atoms, requires a lot of energy to break
Mega structure, weak covalent bonds between the atoms, requires little energy to break
Explain why most giant covalent substances do not conduct electricity.
There are no electrons/ions/charged particles that are free to move
The electrons/ions/charged particles that are free to move
The electrons/ions/charged particles cannot carry the charge
There are not enough electrons/ions/charged particles to carry the charge through the structure
What type of substance are methane and water?
Giant covalent molecules
Simple covalent molecules
Giant ionic lattice
Metallic structure
In an ion, the metal ions tend to be _________ charged
Positively
Negatively
Neutrally
Reversely
What is an alloy?
A mixture of two or more compounds
A mixture of two or more metals
The metal part of a car wheel
A mixture of two or more elements, at least one of which is a metal
Explain why alloys can be harder than pure metals
Because they have a higher melting point
Because they are heavier than pure metals
Different size of atoms disturb the layers to stop them sliding over each other
Different size of atoms have a stronger force of attraction
