Which element is most likely similar to oxygen in that it will form an ion with a 2- charge

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

1. list three scientific reasons cockroaches may fly.