Ionic Compounds & Metals Flashcards
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Ionic Compounds & Metals Flashcards

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Questions and Answers

What is a chemical bond?

The force that holds two atoms together.

What is a cation?

A positively charged ion.

What is an anion?

A negatively charged ion.

What is an ionic bond?

<p>The electrostatic force that holds oppositely charged particles together in an ionic compound.</p> Signup and view all the answers

What is an ionic compound?

<p>A compound that contains ionic bonds.</p> Signup and view all the answers

What is a crystal lattice?

<p>A three-dimensional geometric arrangement of particles.</p> Signup and view all the answers

What is lattice energy?

<p>The energy required to separate 1 mol of the ions in an ionic compound.</p> Signup and view all the answers

What is a formula unit?

<p>The chemical formula for an ionic compound.</p> Signup and view all the answers

What is a monatomic ion?

<p>A one-atom ion.</p> Signup and view all the answers

What is a polyatomic ion?

<p>Ions made up of more than one atom.</p> Signup and view all the answers

What is an oxyanion?

<p>A polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms.</p> Signup and view all the answers

What is the electron sea model?

<p>Proposes that all the metal atoms in a metallic solid contribute their valence electrons to form a 'sea' of electrons.</p> Signup and view all the answers

What are delocalized electrons?

<p>Electrons that are free to move.</p> Signup and view all the answers

What is a metallic bond?

<p>The attraction of a metallic cation for delocalized electrons.</p> Signup and view all the answers

What is an alloy?

<p>A mixture of elements that has metallic properties.</p> Signup and view all the answers

Describe what holds atoms together in a chemical bond.

<p>Chemical bonds are formed by the attraction between the positive nucleus of one atom and the negative electrons of another atom, or by the attraction of positive and negative ions.</p> Signup and view all the answers

Explain the process of ion formation.

<p>A positive ion forms when an atom loses one or more valence electrons to attain a noble gas configuration. A negative ion forms when nonmetals easily gain electrons to attain a stable outer electron configuration.</p> Signup and view all the answers

What are the characteristics of a metallic bond?

<p>A metallic bond is the attraction of a metallic cation for delocalized electrons. Metals hold onto their valence electrons very weakly.</p> Signup and view all the answers

How does the electron sea model account for the physical properties of metals?

<p>When the atom's outer electrons move freely throughout the solid, a metallic cation is formed.</p> Signup and view all the answers

What are alloys and how can they be categorized?

<p>An alloy is a mixture of elements that have metallic properties.</p> Signup and view all the answers

How does ion formation relate to electron configuration?

<p>Ions form when atoms gain or lose valence electrons to achieve a stable octet electron configuration.</p> Signup and view all the answers

How do ionic bonds form and how are the ions arranged in an ionic compound?

<p>Ionic bonds are formed when oppositely charged particles are held together. One atom transfers its valence electron to an atom that is a different element. The one that gives up its electron becomes positive, and the one that accepts the electron becomes negative. They're arranged so that there are 8 electrons in the outer shell of each atom.</p> Signup and view all the answers

What is the formula unit and how does it relate to ionic compounds composition?

<p>The formula unit is the chemical formula for an ionic compound. It represents the simplest ratio of the ions involved.</p> Signup and view all the answers

How do you write formulas for compounds formed from different ions and oxyanions?

<p>The number of the charge is the number of electrons that must be gained or lost for each ion. Find the smallest number that is evenly divisible by both charges. That's how many electrons are transferred.</p> Signup and view all the answers

What are the naming conventions for ionic compounds and oxyanions?

<p>Name the cation followed by the anion. For monatomic cations, use the element name; for monatomic anions, use the root of the element plus -ide.</p> Signup and view all the answers

Study Notes

Chemical Bonds

  • Chemical bonds are forces that hold atoms together through attractions between positive nuclei and negative electrons or between positive and negative ions.

Ions Formation

  • Cations are positively charged ions formed when an atom loses valence electrons to achieve a stable noble gas configuration.
  • Anions are negatively charged ions formed by nonmetals gaining electrons to reach a stable outer electron configuration.

Ionic Compounds

  • Ionic compounds contain ionic bonds, which are electrostatic forces that hold oppositely charged ions together.
  • A formula unit represents the simplest ratio of ions in an ionic compound.
  • Oxyanions are polyatomic ions featuring a nonmetal element bonded to one or more oxygen atoms.

Crystal Structure

  • Crystal lattice refers to the three-dimensional geometric arrangement of ions in ionic compounds, promoting stability.
  • Lattice energy is the energy needed to separate one mole of ions in an ionic compound, indicating the strength of the ionic bonds.

Electron Behavior in Metals

  • The electron sea model explains metallic bonds, suggesting that metal atoms contribute valence electrons to form a sea of delocalized electrons, contributing to conductivity and malleability.
  • Delocalized electrons are free to move, leading to the characteristic properties of metals.

Metallic Bonds and Alloys

  • Metallic bonds arise from the attraction between metallic cations and surrounding delocalized electrons, enabling unique metallic properties.
  • Alloys are mixtures of elements that have metallic properties, categorized based on the elements involved and their arrangement.

Naming and Writing Formulas

  • To write formulas for compounds formed from different ions, identify the total charge and find the smallest number that is evenly divisible by both charges; this gives the number of electrons transferred.
  • For naming ionic compounds, the cation name precedes the anion name; monatomic cations retain the element name while monatomic anions use the element's root plus -ide.

Stability and Configuration

  • Ions result from atoms' attempts to achieve a stable octet electron configuration by gaining or losing valence electrons.
  • In ionic compounds, ionic bonds form when one atom transfers its valence electron to another, creating oppositely charged ions that attract each other, typically aiming for eight electrons in their outer shells.

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Test your understanding of ionic compounds and metals with this flashcard quiz. Each card presents key terms related to chemical bonding, ions, and ionic compounds, making it a great study aid for chemistry students.

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