3 Chemical bondingAS Level

3.7 Dot-and-cross diagrams

1 of 1 objectives have lessons · 0 studied · 0 secure

Lessons

Building single covalent bonds with dots and crossesShow shared electron pairs in H₂, HCl, water, ammonia and other single-bond molecules. 4 min, not started
Showing double and triple bondsCount shared electron pairs in oxygen, nitrogen, carbon dioxide and ethene. 4 min, not started
Drawing ions with dots and crossesShow electron transfer, ion charges and full outer shells in ionic dot-and-cross diagrams. 4 min, not started
When one atom supplies both bonding electronsShow coordinate bonds from nitrogen in ammonium and from chlorine in aluminium chloride dimer. 4 min, not started
When the octet rule bendsDraw dot-and-cross diagrams with expanded shells and spot an odd-electron molecule. 4 min, not started

Syllabus objectives

1 objective

What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.

3.7.1

Use dot-and-cross diagrams to illustrate ionic, covalent and coordinate bonding, including representing any of the compounds stated in 3.4 and 3.5.

Dot-and-cross diagrams may include species with atoms that have an expanded octet, or species with an odd number of electrons.

Taught in: When one atom supplies both bonding electrons, Drawing ions with dots and crosses, Showing double and triple bonds, When the octet rule bends, Building single covalent bonds with dots and crosses · 22 questions