Virtual Lessons

Topic 2A Covalent Bonding, taught by a specialist chemistry teacher.

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The Virtual Lessons come with the Topic 2A Covalent Bonding and Topic 2A Shapes of Molecules course, with every MCQ and exam practice paper, marked by a specialist chemistry teacher. Already bought it? Log in.

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Lesson 2 of 2

Exam Practice

This virtual lesson works through exam-style questions on covalent bonding and molecular shapes, building the skills and confidence needed to perform under examination conditions.

The lesson works through a series of past paper and exam-style questions on covalent bonding and molecular geometry. Questions cover drawing accurate dot-and-cross diagrams, identifying bond types including dative covalent bonds, and applying knowledge of electronegativity and bond polarity to explain the behaviour of covalent substances.

VSEPR theory is applied to predict and explain molecular shapes and bond angles, including the effect of lone pairs on geometry. Examples include molecules and ions from the preceding lesson as well as unfamiliar analogous species, requiring reasoning independently from first principles.

Full worked solutions are provided throughout, with clear explanation of mark scheme logic and common errors to avoid. This session is designed to consolidate understanding and ensure answers can be communicated precisely and confidently in an exam setting.

Specification points for Topic 2A

2.7know that a covalent bond is the strong electrostatic attraction between two nuclei and the shared pair of electrons between them
2.8be able to draw dot-and-cross diagrams to show electrons in covalent substances, including:i
2.9understand the relationship between bond lengths and bond strengths for covalent bonds
2.13know that electronegativity is the ability of an atom to attract the bonding electrons in a covalent bond
2.14know that ionic and covalent bonding are the extremes of a continuum of bonding type and that electronegativity differences lead to bond polarity in bonds and molecules
2.23know that giant lattices are present in:i
2.25know the different structures formed by carbon atoms, including graphite, diamond and graphene
2.27be able to predict the physical properties of a substance, including melting and boiling temperature, electrical conductivity and solubility in water, in terms of:i

Exam Practice

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