Periodic Table of Elements -Symbols, Atomic Number, Atomic Mass, Groups, Videos with FAQs of Periodic Table Elements.

Periodic Table Educational Resources for Ages 12–14 - American Chemical Society

The Periodic Table: An Essential Chemistry Guide

Periodic Table Facts for Kids

How To Explain The Periodic Table To Kids And Facts About It

Opa! Alguma coisa deu errado. Tente novamente. | Khan Academy

Periodic table trends

Periodic Trends in Atomic Size - Chemistry | Socratic