Atoms
The number of protons in the nucleus of an atom.
What is proton number/ nucleon number?
This is used to separate any solution containing liquids with different boiling points.
What is fractional distillation?
Consists of only one substance.
What is pure substance?
A liquid which evaporates easily and has a relatively low boiling point.
What is volatile liquid?
He drew up the Periodic table based on atomic masses.
who is Mendeleev?
The average mass of naturally occurring atoms of an element on a scale where the carbon-12 atom has a mass of exactly 12 units.
What is relative atomic mass?