The hardness of francium is not known.
The hardness of francium is not known.
Francium is more reactive than sodium.
it is softer
It is supposed that francium is a better electrical conductor.
It is supposed that francium is a better electrical conductor.
The hardness of francium is not known.
Francium is more reactive than sodium.
it is softer
Limestone is softer than marble, but harder than chalk.
It is supposed that francium is a better electrical conductor.
It's softer. #1 softest, #2 slightly harder, #3 harder than #2, etc.Softer.a #1 pencil is softer than a#2 pencil
It is supposed that francium is a better electrical conductor.
sodium is a softer metal than lithium.
DENTIN
calcite
it is silver
The first ionization energy is lower.