Lewis Structures

Question types ::: qtype_easyolewis
Maintained by Picture of Carl LeBlondCarl LeBlond
The Lewis structure question type allows teachers to design problems in which students must assign formal charges or add lone pair electrons/radicals to atoms in molecules. This question type requires Marvin Applets by Chemaxon.

Lewis Structures 1.0

Moodle 2.3, 2.4, 2.5, 2.6
Released: Wednesday, April 9, 2014, 10:00 AM
Moodle 2.3 plugin: EasyOChem Marvinsketch Lewis Structure and Charge question type

by Carl LeBlond


This will NOT work with Moodle 2.0 or older, since it uses the new
question API implemented in Moodle 2.1.

This is a Moodle question type. It should come as a self-contained
"easyomech" folder which should be placed inside the "question/type" folder
which already exists on your Moodle web server.

Once you have done that, visit your Moodle admin page - the database
tables should automatically be upgraded to include an extra table for
the EasyOChem Mechanism question type.

You must download a recent copy of Marvinsketch from www.chemaxon.com
(free for academic use) and intall it in folder named "marvin" at your
web root. Alternatively you could edit the php scripts if your marvin
installation is elsewhere. This version of easyomech was developed
using Marvinsketch 5.10.3_b102


The EasyOChem Lewis structure/Formal Charge question can be used to design problems
in which the students must provide electrons (radicals or pairs) or charges on atoms
in molecules. You can ask questions such as;

* Please provide all lone pair electron where required?"

* Indicate the formal charge on any atoms requiring it?

The student then choose the appropriate tool and adds the charges or electrons.

Version information

Version build number
Version release name
Stable version
MD5 Sum
Supported software
Moodle 2.3, Moodle 2.4, Moodle 2.5, Moodle 2.6
  • Latest release for Moodle 2.3
  • Latest release for Moodle 2.4
  • Latest release for Moodle 2.5
  • Latest release for Moodle 2.6

Version control information

Version control system (VCS)
VCS repository URL

Default installation instructions for plugins of the type Question types

  1. Make sure you have all the required versions.
  2. Download and unpack the module.
  3. Place the folder (eg "myquestiontype") in the "question/type" subdirectory.
  4. Visit http://yoursite.com/admin to finish the installation