Do you know the difference between ionic and covalent bonding?
Covalent Bonding GCSE Quiz
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Use some of the following words to complete the statements below. You may use each word more than once.
Diamond, graphite, tetrahedral, delocalised, intermolecular, lattice, covalent, ionic
Complete the following statements:
- Graphite and diamond have high melting points because many strong bonds need to be broken
- does not conduct electricity because it has no electrons
- does conduct electricity because it has only three covalent bonds, leaving one electron from each atom.
- is soft because it is arranged in sheets with weak forces holding them together. These can easily slide over each other
- is hard because the carbon atoms are covalently bonded to 4 other carbon atoms, in a arrangement
Covalent compounds typically form between which two types of material?CorrectIncorrect
Is water an example of a covalent compound?CorrectIncorrect
Which description most accurately describes covalent bondingCorrectIncorrect
Oxygen is in group 6 and fluorine is in group 7. How many fluorine atoms bond with one oxygen atom?CorrectIncorrect
Drag and drop to match the description to the correct type of compound
- Giant covalent compound
- Simple molecular compound
- A structure where each atom has a covalent bond to its neighbour
- A compound which contains atoms covalently bonded together, but with weak intermolecular forces between molecules
If covalent bonds are very strong, then why does water have a low melting point?CorrectIncorrect
Why do simple molecules not conduct electricity?CorrectIncorrect
What is a polymer?CorrectIncorrect
Which of these descriptions best describes fullerenes?CorrectIncorrect
What is graphene?CorrectIncorrect
What do we use fullerenes for?CorrectIncorrect
Use some of the following words to fill in the blanks.
High, low, does, does not
Complete the following statements about the properties of different covalent compounds:
- Simple molecular compounds have melting and boiling points
- Giant covalent compounds have melting and boiling points
- Simple molecular compounds conduct electricity
- Giant covalent compounds usually conduct electricity
- Graphite is an exception since it conduct electricity
Covalent Bonding Dot and Cross Diagram
The dot and cross diagram below shows how covalent bonding works in hydrogen and oxygen. Remember, in an exam, they will want you to fill in the rest of the electrons in the outer shell, or perhaps in all of the shells.
Hydrogen has one electron in its outer shell. That means it needs one electron to form a bond. A hydrogen atom forms a single covalent bond, sharing one electron with another hydrogen atom.
Oxygen has 6 electrons in its outer shell. That means it needs two electrons to form a bond. An oxygen atom forms a double covalent bond, sharing two electrons with another oxygen atom.
Learn more about oxygen covalent bonding.
Why is Diamond Hard?
Diamond is hard because each carbon atom has four strong covalent bonds with other carbon atoms, and they are arranged in a tetrahedral pattern which is also very strong.
Why does Graphite Conduct Electricity?
Graphite is made of carbon and each carbon atom has three covalent bonds with other carbon atoms. Each carbon atom can form four covalent bonds meaning there is one delocalised electron that is free to carry a charge and since electrons have a charge of -1, graphite conducts electricity via the one free electron in each carbon atom.
Why is Graphite Soft and Slippery?
Graphite is soft because it is arranged in sheets of carbon atoms, but each sheet is only held together by weak intermolecular bonds. These weak bonds allow sheets of graphite to slide past each other, making graphite soft.
Why does Diamond and Graphite have a High Melting Point?
Both diamond and graphite have high melting points because they are held together by multiple covalent bonds. Each bond requires lots of energy to break and therefore lots of energy is needed to break all of the bonds between carbon atoms. These bonds must be broken in order to melt diamond and graphite, and so, diamond and graphite have high melting points.
How many Covalent Bonds will an Atom of Carbon Form with other Atoms?
Carbon can form 4 covalent bonds since it is in group 4 and it has 4 electrons in its outer shell. For atoms to be stable, they need a full outer shell which for carbon means it needs 8 electrons in its outer shell.
We hope you enjoyed this covalent bonding quiz. Why not have a go at our other bonding quizzes or read up on some of your most common questions? Take a look at the ionic bonding quiz, or the metallic bonding quiz and then finish off your learning with the bonding models quiz.