This video introduces what's known as 'periodic law'. This is the way that certain properties of elements repeat periodically when arranged by atomic number. The Periodic Table arranges elements into vertical columns (groups) and horizontal rows (periods) to display these trends.










![Polling Station signage [Image: kagey b under CC-BY-NC-ND licence]](/openlearn/files/ole/ole_images/places/general-urban-scenes/polling-station-sign/polling station sign_0_0.jpg)



Be the first to post a comment.
Login or Register to post comments