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 12

Calculate the formal charge on each atom in the Lewis structure of the nitrite ion (NO₂^-).

Calculate the formal charge on the central atom in the Lewis structure of SO₄^2-.

Calculate the total number of valence electrons in the Lewis structure of ClO₄^-.

Calculate the total number of valence electrons in the Lewis structure of the phosphate ion (PO₄^3-).

Describe the concept of resonance as it applies to Lewis structures.

Describe the steps involved in drawing a Lewis structure for a polyatomic ion.

Draw the Lewis structure for the nitrate ion (NO₃^-) and state the formal charge on the central atom.

Explain why some elements in period 3 and beyond can have more than eight electrons in their Lewis structures.

Explain why the Lewis structure of O₃ (ozone) shows resonance.

How many lone pairs are present on the oxygen atom in the Lewis structure of water (H₂O)?

How many resonance structures can be drawn for the carbonate ion (CO₃^2-)?

How many valence electrons are present in the Lewis structure of the ammonium ion (NH₄⁺)?

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

State the octet rule as it applies to Lewis structures.