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Chapter 2

컨트롤 버튼이 '내비게이션' 모드로 변경되었습니다.
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이 집합의 용어 (16)

  • Isotope

    Atoms of the same element that have the same atomic number but different mass numbers.

  • Element

    Pure substances made of one type of atom

  • Atomic Number

    Number of protons in an element

  • Mass Number

    Combined number of protons and neutrons in an element

  • Atomic Mass

    Average mass of all isotopes of a given element

  • Bulk Elements

    Carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur; make up most of living matter

  • Trace Elements

    Required in very small amounts for life

  • Octet Rule

    Atoms are more stable and less reactive when their valence shells are full

  • Oxygen Mass Number and Atomic Number

    Mass: 16

    Atomic: 8

  • Molecule

    Substance containing 2 or more chemically bound atoms, can be two of the same atom

  • Compound

    Molecule composed of 2 or more elements

  • Chemical Formula

    Number and type of atoms in a molecule or compound

  • Electronegativity

    How much an atom tends to attract shared electrons

  • Non-polar covalent bond

    Equal sharing of electrons between atoms that have similar electronegativities

  • Polar covalent bonds

    Unequal sharing of electrons between atoms due to dissimilar electronegativities

  • Ion

    Atom or molecule with a net electrical charge(it has gained or lost electrons)