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Questions and Answers
What is the term for a group of two or more atoms chemically bonded together?
What is the law that states that a chemical compound always contains the same proportion of elements by mass, regardless of its source?
What type of bond is formed by the transfer of electrons between atoms?
What is the term for a reaction where two or more substances combine to form a new compound?
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What is the term for a physical blend of two or more substances, where each substance retains its chemical properties?
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What type of bond is formed by the sharing of electrons between atoms?
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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.
