Covalent bondingIB MYP Chemistry: Flashcards
What these 14 flashcards ask
- What type of atoms form covalent bonds?
- What is a covalent bond?
- Why do atoms share electrons in covalent bonding?
- How many electrons are in a single covalent bond?
- What is a double covalent bond?
- What is a triple covalent bond?
- How many covalent bonds does hydrogen form?
- How many bonds do carbon, nitrogen and oxygen usually form?
- Describe the bonding in CO₂.
- How many non-bonding pairs does the nitrogen atom have in NH₃?
- How many non-bonding pairs does each chlorine atom have in Cl₂?
- What does a dot-and-cross diagram show?
- What is a molecule?
- Name the type of bonding that involves transfer of electrons.
Exam questions on Covalent bonding
- A biogas plant in Kerala produces methane, CH₄, from rotting plant waste. The methane is burned for cooking. Carbon atoms have four electrons in their outer shell and hydrogen atoms have one.Describe how a covalent bond forms between a carbon atom and a hydrogen atom.2 marks
- A scientist studying greenhouse gases examines carbon dioxide, CO₂, which forms when fossil fuels burn. Carbon atoms have four electrons in their outer shell and oxygen atoms have six.Explain how the atoms in a molecule of carbon dioxide each end up with a full outer shell.2 marks
- A student uses a molecular model kit to compare molecules of methane (CH₄), ammonia (NH₃) and water (H₂O). Carbon atoms have four outer electrons, nitrogen atoms five and oxygen atoms six. She records how many hydrogen atoms attach to the central atom of each molecule.Describe the pattern in her results and use it to predict the number of hydrogen atoms that attach to a fluorine atom, which has seven outer electrons.3 marks
Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).