By Oleksandr Koliakin
Lithium is the third element of the periodic table. It is the lightest metal, and actually floats in water. It is a member of the s-block and of the IA group. It is also an alkali metal and it commonly transforms into a +1 ion by losing its single, outer s-orbital electron, making lithium very electropositive.
Sources:
SCIENCIA (book)