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This question is about structure and bonding - AQA - GCSE Chemistry - Question 1 - 2020 - Paper 1
Question 1
This question is about structure and bonding. Which two substances have intermolecular forces between particles? Tick (✓) two boxes. Diamond Magnesium Poly(ethene... show full transcript
Worked Solution & Example Answer:This question is about structure and bonding - AQA - GCSE Chemistry - Question 1 - 2020 - Paper 1
Step 1
Which two substances have intermolecular forces between particles?
Answer
The two substances that have intermolecular forces between particles are poly(ethene) and water. These substances are composed of molecules with weaker intermolecular forces compared to ionic and covalent structures.
Step 2
Step 3
Compare the structure and bonding of the three compounds: magnesium oxide.
Answer
Magnesium oxide (MgO) consists of a lattice structure of ions, with Mg²⁺ and O²⁻ ions held together by strong ionic bonds. This occurs because magnesium, a metal, transfers electrons to oxygen, a non-metal, forming ions.
Step 4
Compare the structure and bonding of the three compounds: silicon dioxide.
Answer
Silicon dioxide (SiO₂) has a giant covalent structure where each silicon atom forms four covalent bonds with oxygen atoms, creating a rigid framework. This structure is similar to that of magnesium oxide in its giant nature but involves covalent bonding rather than ionic.