A Simplified Method for Estimating Atomic Number and Neutrons Numbers of Elements Based on Period and Group Numbers in the Periodic Table : Oriental Journal of Chemistry
Evolution and understanding of the d-block elements in the periodic table - Dalton Transactions (RSC Publishing) DOI:10.1039/C9DT00765B
The location and composition of Group 3 of the periodic table | SpringerLink
The last version of IUPAC periodic table | Download Scientific Diagram
Periodic Table of Elements - IUPAC | International Union of Pure and Applied Chemistry