Ok the question was draw a dot and cross diagram of BCl3 so i did. But i drew it as the boron having a lone pair of electrons because there are only three chlorines. BUt the mark scheme doesnt show any lone pair of electrons. Please advise why is this wrong ...
Like Hira siad, Boron only has 3 lone electrons as it is in group 3. Just out of interest, what made you think Boron had 4 lone electrons, or was that just a honest mistake?