Chemistry: Ions, Anions, and Cations

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Questions and Answers

What is a charged atom called?

  • Ion (correct)
  • Anion
  • Neutral atom
  • Cation

What is the definition of an anion?

Negatively charged atom

What is the definition of a cation?

Positively charged atom

What type of ion is fluorine?

<p>Anion F⁻</p> Signup and view all the answers

What type of ion is potassium?

<p>Cation K⁺</p> Signup and view all the answers

What type of ion is chlorine?

<p>Anion Cl⁻</p> Signup and view all the answers

What type of ion is magnesium?

<p>Cation Mg²⁺</p> Signup and view all the answers

What type of ion is calcium?

<p>Cation Ca²⁺</p> Signup and view all the answers

What type of ion is sodium?

<p>Cation Na⁺</p> Signup and view all the answers

What type of ion is oxygen?

<p>Anion O²⁻</p> Signup and view all the answers

Metals tend to ______ electrons to become positive.

<p>give away</p> Signup and view all the answers

Nonmetals tend to ______ electrons to become negative.

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

Noble gases are chemically unstable and want to gain or lose electrons.

<p>False (B)</p> Signup and view all the answers

What is the Octet Rule?

<p>Atoms want to have 8 valence electrons</p> Signup and view all the answers

What are valence electrons?

<p>Electrons found in the outermost energy level</p> Signup and view all the answers

What is an ionic bond?

<p>Bond held together by the giving/taking of electrons</p> Signup and view all the answers

What is a covalent bond?

<p>Bond held together by the sharing of electrons</p> Signup and view all the answers

What is the electron configuration for an atom with 1 valence electron?

<p>1s²2s²2p⁶3s¹</p> Signup and view all the answers

What is the electron configuration for an atom with 2 valence electrons?

<p>1s²2s²2p⁶3s²</p> Signup and view all the answers

What is the electron configuration for an atom with 3 valence electrons?

<p>1s²2s²2p¹</p> Signup and view all the answers

What is the electron configuration for an atom with 4 valence electrons?

<p>1s²2s²2p²</p> Signup and view all the answers

What is the electron configuration for an atom with 5 valence electrons?

<p>1s²2s²2p³</p> Signup and view all the answers

What is the electron configuration for an atom with 6 valence electrons?

<p>1s²2s²2p⁶3s²3p⁴</p> Signup and view all the answers

What is the electron configuration for an atom with 7 valence electrons?

<p>1s²2s²2p⁶3s²3p⁵</p> Signup and view all the answers

Flashcards

Ion

A charged atom

Anion

A negatively charged ion

Cation

A positively charged ion

Fluorine ion

A negatively charged ion (F⁻)

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Potassium ion

A positively charged ion (K⁺)

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Chlorine ion

A negatively charged ion (Cl⁻)

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Magnesium ion

A positively charged ion (Mg²⁺)

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Calcium ion

A positively charged ion (Ca²⁺)

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Sodium ion

A positively charged ion (Na⁺)

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Oxygen ion

A negatively charged ion (O²⁻)

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Electron transfer (metals)

Metals give away electrons to become positive.

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Electron transfer (nonmetals)

Nonmetals gain electrons to become negative.

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Noble gas stability

Noble gases are chemically stable, they do not gain or lose electrons.

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Octet Rule

Atoms tend to gain, lose, or share electrons to achieve a full outermost electron shell (8 valence electrons).

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Valence electrons

Electrons in the outermost energy level of an atom.

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Ionic bond

A bond formed by the transfer of electrons between atoms.

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Covalent bond

A bond formed by the sharing of electrons between atoms.

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Electron Configuration (1 valence electron)

1s²2s²2p⁶3s¹

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Electron Configuration (2 valence electrons)

1s²2s²2p⁶3s²

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Electron Configuration (3 valence electrons)

1s²2s²2p¹

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Electron Configuration (4 valence electrons)

1s²2s²2p²

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Electron Configuration (5 valence electrons)

1s²2s²2p³

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Electron Configuration (6 valence electrons)

1s²2s²2p⁴

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Electron Configuration (7 valence electrons)

1s²2s²2p⁵

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Study Notes

Ion Definitions

  • Ion: A charged atom resulting from the loss or gain of electrons.
  • Anion: A negatively charged ion formed when an atom gains electrons.
  • Cation: A positively charged ion formed when an atom loses electrons.

Specific Ions

  • Fluorine (F⁻): An anion known for gaining one electron.
  • Potassium (K⁺): A cation that forms by losing one electron.
  • Chlorine (Cl⁻): An anion formed by gaining one electron.
  • Magnesium (Mg²⁺): A cation that loses two electrons.
  • Calcium (Ca²⁺): A cation that also loses two electrons.
  • Sodium (Na⁺): A cation that loses one electron.
  • Oxygen (O²⁻): An anion that gains two electrons.

General Concepts

  • Metals typically give away electrons to form cations.
  • Nonmetals tend to gain electrons, resulting in anions.
  • Noble gases are chemically stable, preferring not to gain or lose electrons.

Chemical Rules and Principles

  • Octet Rule: Atoms aim to have eight valence electrons for stability.
  • Valence Electrons: Electrons located in the outermost shell of an atom.

Bonding Types

  • Ionic Bond: A connection formed through the transfer of electrons between atoms.
  • Covalent Bond: A connection formed by the sharing of electrons between atoms.

Electron Configuration Examples

  • Atoms exhibit specific electron configurations based on their valence electrons:
    • 1 valence electron: 1s²2s²2p⁶3s¹
    • 2 valence electrons: 1s²2s²2p⁶3s²
    • 3 valence electrons: 1s²2s²2p¹
    • 4 valence electrons: 1s²2s²2p²
    • 5 valence electrons: 1s²2s²2p³
    • 6 valence electrons: 1s²2s²2p⁶3s²3p⁴
    • 7 valence electrons: 1s²2s²2p⁶3s²3p⁵

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