Atomic Combination and Chemical Reactions
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Questions and Answers

What is the term for a group of two or more atoms chemically bonded together?

  • Element
  • Compound
  • Molecule (correct)
  • Mixture
  • What is the law that states that a chemical compound always contains the same proportion of elements by mass, regardless of its source?

  • Law of Atomic Combination
  • Law of Definite Proportions (correct)
  • Law of Conservation of Mass
  • Law of Multiple Proportions
  • What type of bond is formed by the transfer of electrons between atoms?

  • Covalent bond
  • Polar covalent bond
  • Ionic bond (correct)
  • Hydrogen bond
  • What is the term for a reaction where two or more substances combine to form a new compound?

    <p>Synthesis reaction</p> Signup and view all the answers

    What is the term for a physical blend of two or more substances, where each substance retains its chemical properties?

    <p>Mixture</p> Signup and view all the answers

    What type of bond is formed by the sharing of electrons between atoms?

    <p>Covalent bond</p> Signup and view all the answers

    Study Notes

    Atomic Combination

    Types of Atomic Combinations:

    • Molecules: A group of two or more atoms chemically bonded together.
    • Compounds: A substance formed by the chemical combination of two or more different elements.
    • Mixtures: A physical blend of two or more substances, where each substance retains its chemical properties.

    Laws of Atomic Combination:

    • Law of Definite Proportions: A chemical compound always contains the same proportion of elements by mass, regardless of its source.
    • Law of Multiple Proportions: When two elements form multiple compounds, the masses of one element that combine with a fixed mass of the other element are in a simple whole-number ratio.

    Types of Chemical Bonds:

    • Ionic Bonds: Formed by the transfer of electrons between atoms, resulting in positively charged ions (cations) and negatively charged ions (anions).
    • Covalent Bonds: Formed by the sharing of electrons between atoms.
    • Polar Covalent Bonds: A type of covalent bond where the sharing of electrons is unequal, resulting in a partial positive charge on one atom and a partial negative charge on the other.

    Atomic Combination and Chemical Reactions:

    • Synthesis Reaction: A reaction where two or more substances combine to form a new compound.
    • Decomposition Reaction: A reaction where a single compound breaks down into two or more substances.
    • Replacement Reaction: A reaction where one element replaces another element in a compound.

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    Description

    Test your knowledge of atomic combinations, including types of molecules, compounds, and mixtures, laws of atomic combination, chemical bonds, and chemical reactions. Learn about synthesis, decomposition, and replacement reactions.

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