McViti

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1. What is the periodic law? 2. What is the atomic number? 3. What particle has a positive electric charge? 4. What particle has a negative electric charge? 5. Where are protons and electrons located within an atom? 6. What is the periodic table? 7. Who stated the first periodic law? 8. When was this law proposed? 9. In what year and who first stated the existence of triads? 10. What is a triad? Annotation: The article is headlined "Periodic Law" and it was written by Marilyn Senterfitt. It was published in the Nature Friends on 27th May 2008. The purpose of the article is to inform the reader of the principle behind the periodic law. The article mentions who was the first person to propose the periodic law. The author also points out a previous scientist who noticed the existence of triads. In my opinion, the text could be more elaborate and the author could have provided some visual examples of the elements and their properties to make it easier to understand. But generally, I found the article fairly useful as a basic introduction of the periodic law.