Modern periodic table was last modified in the early 20th century when Henry Moseley discovered that the properties of the elements were related to their atomic number (the number of protons in the nucleus), not their atomic mass. This led to the current configuration which arranges the elements in order of increasing atomic number and groups them by their chemical and physical properties.

New Ways of Looking at the Elements

What is the periodic table of the future?

Evolution of the Periodic Table

The history of the Periodic Table.

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Order of Formation

Hydrogen was the first element formed early in the history of the universe. We’ll explore the elements in order they first occurred, either naturally, man made, or theoretical.

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Occurrence

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History of Discovery

Discover the elements in the order we discovered them. From before written history through present to predictions of theoretical elements of the future.

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Atomic Weight

Some elements are heavier than others.

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Bonding Type

Some elements tend to bond in the same way

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Phases

Most elements are solid at normal conditions, a few are gas and two are liquid

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Orbitals

Principal Quantum Numbers and Subshells

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Conductivity

How freely can electrons flow within the crystal structure of each element

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Crystal Structure

Crystal Structure

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Magnetism

Magnetism

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Electronegativity

Electronegativity

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