The court heard how Daniel Bartlam hit his mother seven times with a claw hammer at their home in Georgia Drive, Redhill, Nottingham.
He then poured petrol around her bedroom before lighting newspaper on a gas fire and setting the property alight.
More top news
Eight children have been injured, three seriously, after a huge tree fell on them during a summer camp in southern California.
Movie fans can bid for a piece of cinema history as an iconic costume from the first Mission: Impossible film is put up for auction.
The British Army has been scaled down by more than 20,000, three years ahead of target.