Lewis Structures

Chemistry ⇒ Chemical Bonding and Structure

Lewis Structures starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Lewis Structures. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 11

Calculate the formal charge on the nitrogen atom in the Lewis structure of NO₂⁻.

Calculate the total number of valence electrons in the Lewis structure of the sulfate ion (SO₄²⁻).

Describe the difference between a single, double, and triple bond in a Lewis structure.

Describe the steps involved in drawing the Lewis structure for SO₂.

Explain why the Lewis structure of BF₃ does not satisfy the octet rule for boron.

Explain why the Lewis structure of O₂ contains a double bond between the two oxygen atoms.

Explain why the Lewis structure of SF₆ violates the octet rule.

How many bonding pairs and lone pairs are present in the Lewis structure of H₂O?

How many lone pairs are present on the central atom in the Lewis structure of PCl₃?

How many resonance structures can be drawn for the carbonate ion (CO₃²⁻)?

A student draws a Lewis structure for the molecule SF₄ and places all lone pairs on the fluorine atoms. Explain why this structure is incomplete and describe the correct placement of lone pairs.

Calculate the total number of valence electrons in the Lewis structure of the phosphate ion (PO₄³⁻).

Describe the process for determining the most stable Lewis structure when more than one valid structure can be drawn for a molecule.

Draw the Lewis structure for the chlorate ion (ClO₃⁻) and determine the formal charge on the central chlorine atom.