HS-PS1-1

Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.

  1. Materials Science

    Long-sought subatomic particle ‘seen’ at last

    Physicists have finally caught a brief glimpse of massless subatomic particles that were first predicted to exist 85 years ago. It’s the elusive Weyl fermion.

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  2. Brain

    To protect kids, get the lead out!

    Lead poisons hundreds of thousands of children. In Chicago, experts show how the toxic metal hurts test performance in school.

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  3. Chemistry

    Scientists Say: Ion

    Some atoms and molecules have a positive or negative electrical charge. These are called ions.

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  4. Chemistry

    Form some bonds with a chemistry card game

    A new game can make aspects of learning chemistry fun. Pair charged elements together to create neutral compounds. Win points in the process.

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  5. Tech

    Rewritable paper: Prints with light, not ink

    Rewritable paper could save money, preserve forests and cut down on waste — and all without using any ink.

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  6. Tech

    Digital lighting goes organic

    An environmentally friendly lighting technology promises not only to save energy but also to transform our indoor environment.

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  7. Chemistry

    Scientists confirm element 117

    Scientists have confirmed the existence of a new, short-lived superheavy element. For now, they’re calling it ununseptium.

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  8. Physics

    World’s coolest ‘clock’ is also crazy-accurate

    This is the time to beat — the world’s most accurate atomic clock ever. At its heart is a ‘fountain’ of cesium atoms chilled nearly to absolute zero!

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  9. Physics

    Neutrinos not so fast

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