Chemical Bonding: Olympiad Practice

Name: Chemical Bonding: Olympiad Practice
Author: StemPy Lab

The hard questions of the chapter: dipole moments and molecular shape, tricky Lewis structures and formal charges, back bonding and bridges, and comparing bond lengths and energies, with a full paper.

3 lessons, about 1 h 25 min3 simulations11 problems4 practice questionsPython in every lesson

Created by StemPy Lab

Course outline (3 lessons)

Lesson 1about 30 min
Dipole moments and shape
A dipole moment has a size and a direction, so the dipole of a molecule is the vector sum of its bond dipoles and lone pairs. Symmetric shapes cancel to zero. A measured dipole tells the shape of a molecule, how ionic a bond is, and a cis isomer from a trans one.
1 simulation2 practice questions1 Python program4 problems1 Python lab
Read the lesson
Lesson 2about 30 min
Tricky structures and formal charges
Formal charges pick the best of several Lewis structures: the smallest charges, with any negative charge on the most electronegative atom. Atoms from period 3 down can hold more than eight electrons, and molecules with an odd number of electrons keep one unpaired. Boron makes up for its empty orbital by back bonding, and diborane by bridges.
1 simulation1 practice question1 Python program4 problems1 Python lab
Read the lesson
Lesson 3about 25 min
Comparing bonds
Bonds get shorter and stronger as the bond order rises, and longer as the atoms get bigger. Resonance gives ions bond orders between whole numbers. Bond angles shrink down a group and when the outer atoms pull harder. Fajans' rules tell when an ionic bond turns partly covalent.
1 simulation1 practice question1 Python program3 problems1 question set
Read the lesson

Test Your Learning

Chemical Bonding: Olympiad Paper

15 questions · 30 min

Not started

Your teacher

StemPy Lab

← All Courses

← Molecular Orbitals and Hydrogen BondingNext →

More onChemical Bonding › Lewis Structures and Ionic Bonds Chemical Bonding › Shapes of Molecules and Hybridisation Chemical Bonding › Molecular Orbitals and Hydrogen Bonds

Discussion (0)

Loading…

Chemical Bonding: Olympiad Practice

Course outline (3 lessons)

Dipole moments and shape

Tricky structures and formal charges

Comparing bonds

Test Your Learning

Your teacher

Discussion (0)