Learn about the basic building blocks of all matter and how atoms of different elements have unique properties. Discover how elements are organized on the periodic table and what makes each …

The periodic table organizes all known elements by atomic number, displaying them in rows and columns called periods and groups. Each element’s square includes its symbol, atomic number, and …

Discover how to organize and categorize all the matter around you! Learn about atoms as the building blocks of elements, explore the periodic table as your guide to the elements, and understand how …

Hank gives us a tour of the most important table ever, the Periodic Table of Elements. Learn about Dmitri Mendeleev, the mastermind behind this table, and discover how Mendeleev's obsession with …

Practice Identify metals and nonmetals in the periodic table Get 3 of 4 questions to level up! Periodic trends: metallic, nonmetallic, electropositive, & electronegative characters Get 5 of 7 questions to …

The periodic table organizes elements into groups and periods based on their chemical and physical properties. Elements in the same group share similar characteristics, like reactivity. The table is …

In this third unit of class 11, chemistry, we will study the historical development of the periodic table and the modern periodic law. We will also learn how the periodic classification follows as a logical …

Anomalous properties of second period elements Get 3 of 4 questions to level up!

The modern periodic table is based on the periodic law: "The chemical properties of elements are a periodic function of their atomic number." Let's see how is this different from Mendeleev's periodic …

Unit 2: Classification of elements and periodicity in properties 400 possible mastery points Mastered Proficient