Easy 8th grade science
which of the following is the si unit used by chemists to measure the amount of an element or substance?

mole

milliliter

atom

molecule

Generally chemists measure substance in moles because it is very difficult to count the number of molecules

The process that is occurring as iodine solid is transformed into iodine vapour is SUBLIMATION.
Sublimation is the process by which a substance transformed from a solid state straight into a gaseous state without passing through the liquid state. Iodine is capable of undergoing sublimation process and this property is usually used to separate iodine from mixtures.