Recent content by Mr Curious

When Chlorine atoms for a molecule of Chlorine Gas, it becomes - Cl'2' (chlorine subscript 2). This is because it is a halogen and it does covalent bonding. However, why is it that when a molecule of Oxygen is formed it is also - O'2' (Oxygen subscript 2) even though oxygen it a group 6?

I just recently got a brand new xbox 360 arcade for $150 AUS, if I trade this in at EB games, will it have the same value as trading in a used xbox 360 arcade (will I get the same money amount of money in return) or will I get more seeing as it's brand new. Either EB games, or gamespot, I was...