The question is straightforward, but it is said that 1. Group metals reacts greatly with water but also it says their density is lower so they float on water. How is it possible to detect? And what it means when they say they float on water. I'm confused, but of course i know if density is lower they can float. But what's the point, if they don't have a min to float?!
Answers (1)
Density has nothing to do with water. Density is grams per cubic centimeter. Water is one gram per cubic centimeter, so anything with a lower density would float in water. Sodium for example will float on water while generating flames and sputtering the water all around.