Ionic and Molecular Lewis Formulas Quiz

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Questions and Answers

What is the primary difference in electron behavior between ionic and covalent bonds, according to Lewis structures?

Ionic bonds involve sharing of electrons, while covalent bonds involve transfer.
Ionic bonds form between atoms with similar electronegativity, whereas covalent bonds occur between atoms with large electronegativity differences.
Ionic bonds involve the transfer of electrons from a metal to a non-metal, while covalent bonds involve sharing between atoms. (correct)
Ionic bonds feature delocalized electrons, and covalent bonds have localized electrons.

In a Lewis dot diagram, how are ionic and covalent bonds distinguished?

Ionic bonds show the net charges on ions within brackets, while covalent bonds show shared electrons between atoms. (correct)
Ionic bonds use brackets for both atoms, but covalent bonds do not uses any brackets.
Ionic bonds use only dots, whereas covalent bonds use lines and dots to portray electron configuration.
Ionic bonds are represented by lines between atoms, whereas covalent bonds are represented by dots.

According to the provided information, what is the maximum number of single bonds that a carbon atom can form?

2
4 (correct)
5
3

Which of the following statements correctly describes the relationship between electronegativity difference and bond type?

Electronegativity differences below 1.7 indicate covalent bonds, while differences of 1.7 or greater suggest ionic bonds. (D) Signup and view all the answers

How are shared electrons represented in Lewis structures for molecules?

Shared electrons are depicted as lines or pairs of dots between atoms. (A) Signup and view all the answers

What determines the central atom when drawing Lewis structures for molecules?

The atom that can form the most number of bonds is typically the central atom. (C) Signup and view all the answers

Which of the following correctly describes the bonding capacity of oxygen?

Oxygen typically forms one double bond or two single bonds. (D) Signup and view all the answers

In Lewis structures, what is the exception to the octet rule and how many electrons surround it?

Hydrogen, 2 electrons. (D) Signup and view all the answers

Flashcards

Ionic Bonding

Ionic bonds form when there is a large electronegativity difference between atoms, typically ≥ 1.7. Electrons are transferred from the metal to the nonmetal, resulting in a cation (positively charged ion) and an anion (negatively charged ion). The attraction between these oppositely charged ions creates the ionic bond.

Lewis Dot Diagram for Ionic Compounds

Lewis dot diagrams are visual representations of atoms and molecules, showing the relative number of valence electrons. For ionic compounds, the diagram shows the cation with its positive charge enclosed in brackets and the anion with its negative charge also in brackets. This helps visualize the transfer of electrons and the formation of ions.

Covalent Bonding

A covalent bond is formed when two atoms share electrons. This occurs when the electronegativity difference between the atoms is less than 1.7, indicating a less drastic difference in their attraction for electrons. The shared electrons are located between the atoms in the Lewis dot diagram.

Lewis Dot Diagram for Covalent Compounds

Lewis dot diagrams for covalent bonds show the arrangement of atoms and shared electrons. Shared electrons are represented by pairs of dots between the atoms. This helps understand the structure of molecules and the number of bonds between atoms.