Atoms and Molecules

The entire physical world is made up of a relatively few substances, and these exist as atoms and molecules.

All of the materials and substances that we experience are made up of elements

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The study of what happens when an atom is broken apart is the subject of nuclear physics.

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The periodic table sorts the elements by chemical properties and are listed horizontally in order by atomic number.

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Defining the orbits of electrons and the maximum number at any level

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The relative mass of an individual atom of that element

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Avogadro's number, also known as Avogadro's constant, is a fundamental constant in chemistry that represents the number of atoms, molecules, or particles in one mole of a substance.

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Test your knowledge in atoms and molecules

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