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CH.E Chemical context of life

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Termini in questo insieme (10)

  • Matter

    Anything takes up space and mass- elements and compounds

  • Element

    Substance cannot be broken down into others thru chemical reactions

  • Compound

    substance made of two or more elements in a fixed ratio

  • Atomic number

    Protons in nucleus

  • Atomic Mass

    atoms total mass --> Aproximated by mass number

  • Mass #

    protons + neutrons in a nucleus

  • Isotopes

    two atoms of an element that differ in # of neutrons

  • Radioactive Isotopes

    Decay spontaneously + give off particles and energy

  • Chemical 'behavior'

    determined by electron distribution

  • Valence electrons

    electrons in outermost shell