bonding Flashcards
1
Q
explain how hydrogen bonding occurs in HF
A
large difference in electronegativity between H and F / F
most/very/much more electronegative / values ‘4’ & ‘2.1’ quoted 1
(not just ‘higher’)
δ+H-Fδ- dipole created or dipole clearly implied 1
(accept arguments such as ‘uneven charge in bond’/’polar bond’
(F slightly negative/H slightly positive)
attraction/bond formed between δ+H and lone pair on F
2
Q
why is AL3+ more conductive than Mg2+
A
there are more delocalised electrons in AL3+ than Mg2+
therefore there are more electrons free to move around and carry the charge
3
Q
explain why in terms of structure and bonding why the boiling point of carbon is high
A
carbon is a macromolecule with covalent bonds
it requires a lot of energy to break these bonds
