Term: Aluminium, Description: Chemical element with atomic number 13, Question: When it comes to aluminium the atomic numbers falls somewhere between 10 and 20?, Answer:Yes
Fact1:  Atomic number of aluminium is 13 so its electronic configuration is 2, 8, 3. Since it has 3 electrons in its valence shell, it will lose 3 electrons to complete its octet hence its valency is +3. Fact2:  The atomic number of Aluminium is 13 ,so its electronic configuration is 2, 8, 3 .   