HS-PS1-2

Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.

More Stories in HS-PS1-2

  1. Chemistry

    Explainer: What are fats?

    A fat molecule's three long chains of carbon and hydrogen atoms repel water, stash energy and keep living things warm — even in the bitter cold.

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  2. Chemistry

    Snail slime + gold could boost the power of sunscreens and more

    These two strange ingredients could make skin-care products that are better for both our skin and the environment.

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  3. Chemistry

    Explainer: What is a metal?

    Metals can bend and pull without snapping, and conduct electricity. The reason: Their atoms tend to lose electrons to neighboring atoms.

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  4. Agriculture

    Potty-trained cows could help reduce pollution

    About a dozen calves have been trained to pee in a stall. Toilet training cows on a large scale could cut down on pollution, scientists say.

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  5. Chemistry

    Chemists win Nobel Prize for faster, cleaner way of making molecules

    Both scientists independently came up with new process — asymmetric organocatalysis. That name may be a mouthful, but it’s not that hard to understand.

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  6. Materials Science

    Scientists Say: Aerosol

    Aerosols are tiny bits of solids or drops of liquids suspended in gas. Aerosols include mist, fog and soot, as well as pollution from fossil fuels.

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  7. Chemistry

    Explainer: What is an electrode?

    An electrode’s name depends on the circumstances. Confused? It may help to consider which electrochemical reaction is natural — and which is not.

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  8. Chemistry

    Explainer: Ions and radicals in our world

    When atoms get an electric charge, they act very differently. Now called ions, these are behind many aspects of chemistry, including acids and batteries.

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  9. Chemistry

    Scientists Say: Bond

    In chemistry, this attachment between atoms forms because of the power of attraction. Chemical bonds make up every solid object on Earth.

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