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Structure of metals and alloys (practice) | Khan Academy
Practice identifying and interpreting particulate models of alloys in this set of free questions designed for AP Chemistry students.
Phase diagrams (video) | States of matter | Khan Academy
Specific heat, heat of fusion and vaporization example. Chilling water problem. Change of state example. Vapor pressure. Phase diagrams. Representing solids, liquids, and gases using particulate models. Crystalline and amorphous polymers. Representing alloys using particulate models. Structure of metals and alloys.
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Watch a video that explains how metallic bonds form and why metals have unique properties. Khan Academy offers free, high-quality education for anyone, anywhere.
Types of mixtures (video) | Khan Academy
A mixture is composed of one or more pure substances in varying composition. There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout. The most common type of homogenous mixture is a solution, which can be a solid, liquid, or gas.
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Explore the structure of ionic solids in AP Chemistry on Khan Academy.
AP®︎/College Chemistry - Khan Academy
Learn AP Chemistry using videos, articles, and AP-aligned practice. Review the fundamentals of atomic structure, intermolecular forces and bonding, chemical reactions, kinetics, thermodynamics, and equilibrium.
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Math: Pre-K - 8th grade; Pre-K through grade 2 (Khan Kids) Early math review; 2nd grade; 3rd grade; 4th grade; 5th grade; 6th grade; 7th grade; 8th grade; 3rd grade math (Illustrative Math-aligned)
Adaptive immunity - Khan Academy
After formation and maturation in the bone marrow (hence the name “B cell”), the naive B cells move into the lymphatic system to circulate throughout the body. In the lymphatic system, naive B cells encounter an antigen, which starts the maturation process for the B cell.
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