Lithium, whose silvery-white colour tarnishes on oxidation when exposed to air, is the most electropositive metal (−3.04 V versus a standard hydrogen electode), the lightest (M = 6.94 g mol −1 ...

Centurion at Gold Ribbon Rescue Michelle Goldberg introduces us to Centurion. He's their 100th dog that was brought to their rescue and is looking for a good home.