Use molecular shape to decide whether bond dipoles cancel.

In the subtopic Electronegativity and bond polarity, this AQA A-Level Chemistry 7405 learning objective focuses on use molecular shape to decide whether bond dipoles cancel. It belongs to Bonding, so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include dipole. Bond dipole. means a measure of the polarity of a bond, indicating the separation of positive and negative charges due to differences in electronegativity between bonded atoms Avoid the mistake of students often incorrectly assume that if a molecule has polar bonds, it must be a polar molecule without considering its shape; instead, to determine if bond dipoles cancel, first identify the molecular shape. Use the VSEPR theory to predict the shape based on electron pair repulsion. If the shape is symmetrical, the dipoles may cancel out, resulting in a non-polar molecule. For example, in carbon dioxide (CO2), the linear shape leads to cancellation of dipoles, making it non-polar For exam answers, when determining if bond dipoles cancel in a molecule, first identify the molecular shape and the electronegativity of the atoms involved. If the shape is symmetrical, the dipoles may cancel out, leading to a non-polar molecule