Periodic Table - Khan Academy
The periodic table organizes chemical elements based on their properties, helping to understand the relationships between them.
Oxidation state trends in periodic table - Khan Academy
Let's see if we can come up with some general rules of thumb or some general trends for oxidation states by looking at the periodic table. So first, let's just focus on the alkali metals. …
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Each atom has a charged sub-structure consisting of a nucleus, which is made of protons and neutrons, surrounded by electrons. The number of protons and the mass number of an atom …
Unit 1: Atoms, compounds, and ions - Khan Academy
This unit is part of the Chemistry library. Browse videos, articles, and exercises by topic.
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If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and …
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Learn about the periodic table of elements with Khan Academy's free online educational video.
Atomic radius trends on periodic table - Khan Academy
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Periodic classification of elements | Khan Academy
Learn how the periodic table organizes the known elements of our world. In this unit, we will learn about the history of the periodic classification of elements, Mendeleev's periodic law, its merits …
First and second ionization energy (video) | Khan Academy
An element's second ionization energy is the energy required to remove the outermost, or least bound, electron from a 1+ ion of the element. Because positive charge binds electrons more …
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Let's practice to find position of an element in the periodic table by finding out the group and period number.