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SingaporeChemistryQuick questions
Atomic Structure and Bonding
Quick questions on Covalent bonding and simple molecules: N(A)-Level Chemistry
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are dot-and-cross diagrams?Show answer
A dot-and-cross diagram shows the outer-shell electrons of each atom, using dots for one atom and crosses for the other, with the shared pair sitting between the bonded atoms. Worked examples:
What is q1?Show answer
State what is meant by a covalent bond. [1 mark]
What is q2?Show answer
Explain why carbon forms four covalent bonds in methane. [2 marks]
What is q3?Show answer
Explain why a simple molecular substance such as iodine has a low melting point. [2 marks]
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