Chemistry · May / June 2023 · Paper 41 · Question 3
0620
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This question is about ionic and covalent compounds.
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3(a)(i)[3]
M1 Na with 2,8 all crosses(1)
M2 O with 2,8 outer shell with 6 dots and 2 crosses(1)
M3 + AND 2−(1)
3(a)(ii)[1]
Na2O
3(b)[2]
M1 both bonds with 2 dots and 2 crosses(1)
M2 2 lone pairs
(all dots or all crosses) on both oxygen atoms completing all 3 octets(1)
3(c)(i)[2]
M1 positive ions and negative ions (1)
M2 strong attraction / strong bonds (1)
3(c)(ii)[1]
intermolecular forces
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