Questions and Answers
What does a chemical formula show?
What does the term 'subscript' mean?
Written below
What is a chemical bond?
The force that holds atoms together in a compound.
What is an ion?
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What is a cation?
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What is an anion?
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What characterizes an ionic bond?
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What is meant by zero net charge?
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What is a covalent bond?
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What is a molecule?
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What defines an ionic compound?
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What defines a covalent compound?
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Ionic compounds have a ____ melting point.
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Covalent bonds have a _____ melting point.
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What is a nonpolar bond?
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What is a polar bond?
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What is a polar molecule?
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What is a nonpolar molecule?
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What is an oxidation number?
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What are binary compounds?
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Study Notes
Chemical Formulas and Bonds
- A Chemical Formula specifies which elements are present in a compound and the number of atoms of each element.
- Subscript indicates the number of atoms in a compound by being written below the element symbol.
Types of Chemical Bonds
- A Chemical Bond is the force that holds atoms together in a compound.
- Ions are charged particles that can have an imbalance in the number of electrons and protons.
- Cations are positively charged ions, while anions are negatively charged ions.
Ionic Bonds
- An Ionic Bond forms due to the attraction between oppositely charged ions (nonmetals and metals involve the transfer of electrons).
- Zero Net Charge indicates that ionic bonds can create a neutral compound overall.
Covalent Bonds
- A Covalent Bond is the attraction formed when atoms share electrons (typically between nonmetals).
- Molecules are neutral entities formed as a result of electron sharing in covalent bonding.
Types of Compounds
- Ionic Compounds result from bonding between metals and nonmetals.
- Covalent Compounds involve bonding between nonmetals only.
- Ionic Compounds generally have a higher melting point than covalent compounds, which possess a lower melting point.
Molecular Characteristics
- Nonpolar Bonds involve equal sharing of electrons between atoms, resulting in no charge difference.
- Polar Bonds involve unequal sharing, causing one end to be slightly positive and the other slightly negative, leading to the formation of Polar Molecules.
- Nonpolar Molecules lack charged ends, maintaining overall neutrality.
Additional Concepts
- Oxidation Number indicates the number of electrons an atom gains, loses, or shares to achieve stability, represented as positive or negative numbers.
- Binary Compounds are composed of exactly two different elements.
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Description
Test your knowledge on chemical bonds with this set of flashcards. Each card defines key terms such as chemical formula, subscript, chemical bond, and ion. Perfect for students looking to reinforce their understanding of Chapter 18 in chemistry.