It was the luna 2 it weighed about 2 million pounds.
The lightest alkaline earth metal is Beryllium(Be) having atomic mass 9.012 dalton. The heaviest element in this family is radium.
I have absolutely no idea!
scoria
Mercury is the lightest planet, with a mass of 0.055 that of Earth.
No, water is not the lightest liquid on Earth. Liquid hydrogen and liquid helium are lighter than water because they have lower densities.
Net books are a great piece of technology. The lightest one is about 2.5 pounds.
the mantel
2111
The puma V1.10 lightning SL
Lithium is the lightest metal, Potassium is the second lightest -- density about 0.86 kg/L
water is the and most found substance also earth and air
Hydrogen