June 2018 paper 2 Flashcards
Identify the s-block metal that has the highest first ionisation energy
Be /Beryllium
Give the formula of the hydroxide of the element in Group 2, from Mg to Ba, that is
least soluble in water.
Mg(OH)2
Use your knowledge of structure and bonding to explain why sodium bromide has a
melting point that is higher than that of sodium, and higher than that of sodium iodide.
Stage 1- Na
1a) Na has metallic bonding
1b) there is attraction/ bonding between the positive
nucleus/ ion and the delocalised electrons in Na
1c) Na has a giant/lattice structure
Stage 2 – NaBr or NaI
2a) Ionic bonding in NaBr and/or NaI
2b) There is attraction/ bonding between the + and –
ions in NaBr and/or NaI
2c) NaBr and/or NaI have a giant/lattice structure
Stage 3 - comparison of bonding
3a) The ionic bonds are stronger (or wtte) than the
metallic bonds
3b) there is stronger attraction (or wtte) between the
+ and – ions in NaBr than in NaI
3c) since the Br –
ion is smaller than the I–
ion
