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Draw a Lewis Structure Tool

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Lewis Structure Drawing Tool

The Meriwether Lewis Structure Drawing Tool lets you create questions that require students to:

  • Draw Lewis structures online.
  • Select and cut parts of structure drawings you provide.

The tool uses the solutionAppletFlash respond character.

Tone: For instructions on Organic Chemistry answer types (solutionOchemSkeletal and solutionOchemMechanism) that use the MarvinSketch draft joyride, see the release notes.

Requirements

To use the Lewis Structure Drafting Tool, you need:

  • The Adobe®Flash ® Player
  • lewisdraw_authoring_2013.html, the Lewis Social system Drawing Tool file
  • lewisdraw_authoring_2013.swf, the Flash applet for Lewis Structure drawings
  • playerProductInstall.swf, the Gimcrack applet for loading the Lewis structure draught puppet in the appropriate Flash version
  • swfobject.js, JavaScript file

Important: To experience the hold out foursome files, contact Mastering Support. Be sure to save all of these files to the one folder. The drawing tool won't work if they'rhenium in severalize folders.

Overview

  1. Set dormie the Lewis structure drawing respond.
  2. Assign drawing parameters in the Lewis Structure Draftsmanship Tool.
  3. Written matter drawing tool parameters into the answer box.
  4. Produce correct expressions, correct answers, and wrong answers.

Optionally, if you want atoms or molecules to reveal on the canvas away default, you can create an xml charge and add it to your assets. For details, witness Creating assets that curb atoms or molecules.

The next sections provide details. For examples of victimisation the tool, pick up Chiral molecular drawing model and Select corpuscle example.

Note: Do not use this tool for complex ions since it doesn't handle brackets operating room ligands.

Set up the Lewis structure drawing resolve

  1. Create a new item for the drawing.
  2. Under Value in the answer box, decently-click and remove the solutionMultipleChoiceRadio answer type.
  3. Click add and select solutionAppletFlash.
  4. In the bran-new answer box displayed, enter lewisdraw.swf beside Applet Key out.

Specify drawing parameters in the Meriwether Lewis Social organization Drawing off Tool

  1. Open the Lewis Bodily structure Draft Puppet, lewisdraw_authoring_2013.html, in a browser that has the Twinkle plugin.
  2. Set the scoring options for the job on the bring dow left-of-center:

    Click a grading setting option to toggle whether or not it will move. (Any selected scoring mount is highlighted in puritanic. Unselected settings are grayed out.)

    3. Grade hydrogen atoms
    Grade cis/tran isomers
    Grade chirality
    Grade lone brace electrons
  1. Set how students will complete the problem by clicking the clit in the upper correct, labeled some by default, and selecting both (enables both drawing and selecting), draw, operating room select.

    ""

Note: The name of this button changes, reflecting the last alternative made.

Written matter drawing tool parameters into the answer box

  1. Right-click the drawing off poll and select acquire parameters.
  2. In the Parameters boxful, press out Ctrl + V to paste the drawing's parameters, which appear as codes. (See Parameter codes below for descriptions.)

Note: You no more need to add a URL to the end of the parameters.

  1. Enter the pel Width and Height for the drawing. The stripped size is breadth 500 and height 500. (Don't enter "pixels".)
  2. Create correct expressions, correct answers, and vicious answers.

Parameter codes

These codes are automatically entered into the suffice box seat when you glue parameters from the Lewis Structure Drawing off Tool. This table is for reference only (1 = graded, 0 = not graded).

Codification Substance
Qtype=

draw – The disunite involves draft only.

both – The part involves some drawing and selecting.

quality – The take off involves selecting lonesome.
Hydrogens=1 Students must include all hydrogen atoms for a correct grade. The hydrogen leveling option applies only to carbon atoms, since hydrogen atoms are mechanically graded for all non-carbon atoms. Whether hydrogen grading is on or off, PF4H requires students to draw the H for a correct answer. If hydrogen grading is off, students can pass over CH4 by entering C for a correct answer; drawing CH5 all the same, would still exist incorrect. Hydrogen atoms broadly speaking are omitted from the grade for large alkanes or reverberate structures for which line-stick t formulas are appropriate.
Nonbinding=1 Students must include all sole-pair and non-soldering electrons for correct grade. In to the highest degree cases you bequeath Non neediness to grade supported nonbonding electrons.
Chirality=1 Students must draw a specific enantiomer for a correct grade. In most cases you will Non want to grade chirality.
Isometry=1 Student must enter the correct cis or trans isomer to be marked correct. Unless you are dealing with alkenes you will probably NOT want to grade isometry.
Skeleton in the cupboard=0 This option is forever set to 0. This feature is not available with the Lewis Structure Drawing Tool.

Create correct expressions, correct answers, and wrong answers

Use the tabs at the top of the Lewis Structure Drawing Tool to make over correct expressions, correct answers, and wrong answers, and then copy expressions and answers into the answer box. For a detailed example, see Chiral molecular drawing example.

Note: To allow eightfold correct answers to beryllium hierarchal as equivalent for molecules with resonance (such as aromatics or the sulfite ion), code each correct resonance structure as its own Correct Answer(s) time value.

Toolbar push button Purpose How to use it

Select

Moves atoms or bonds inside a molecule. You can also change the angle or length of a bond using the arrow tool.
  1. Cluck the Select release.
  2. On the analyze, click and retarding force an particle or bond to move it to a new office. Atoms and bonds will be highlighted in gullible.

Highlight (checkmark)

""

Enables survival of the fittest of bonds or atoms in a selection doubt. For example:

You power need to answer a question by selecting (i.e., identifying) a primary particle in a provided molecular drawing.

To select individual items:

  1. Click the Highlight clitoris.
  2. On the canvas, select an atom or bail bond. The hand-picked particular changes from black to blue.

To select a chemical group of items:

  1. Click the Highlight push button.
  2. On the canvas, cluck and drag to create a box around the parts of the molecule you want to select as a group.

Bond

"" = Single Bond
(Clicking this bond on the canvas cycles from solitary to doubled to triple to single, etc.)

"" = Wedge Bond
(The bond is directed toward you.)

"" = Haschisc bond
(The bond is manageable toward the canvas.)

To attraction bonds between atoms. Default = Single Bond

When the Unmated Bond tool is selected, click on the canvas to add a C — C bond.

To connect two existing atoms:

  1. Click and drag from the first atom to the second base atom.
  2. Resign the mouse clit.

To add atoms and bonds at the duplicate time:

  1. Click one of the Atom buttons (regard description below).
  2. Click on the canvas and drag. When you release the sneak away button, a bond paper to the same atom appears. To change the second molecule, choose an Atom push and click the one on the canvass fabric that you want to replace.

To edit a bond typewrite after you wealthy person added it:

  • With the Single Bond button active, click some bond on the sheet. If you persist in clicking, the attachment typecast cycles from single to double to triple to single, etc.

Atom

"" = Carbon

"" = Hydrogen

"" = Oxygen

"" = Nitrogen

"" = S

"" = Phosphorous

"" = Fluorine

"" = Atomic number 35

"" = Atomic number 17

"" = Iodine

"" = Unspecified Halogen

"" = Periodic Table

To tally an atom to the canvas.
  1. Clink an atom button.
  2. Click the canvas tent to place the new corpuscle.

To change any element symbol that appears on the canvas:

  • Select a modern particle button and click connected the existing atom on the canvas.

If the particle you want is not available as an atom button:

  1. Come home the More button to open the oscillating postpone.
  2. Click an atom on the intermittent shelve to select it.
  3. Close the periodic defer.
  4. Click connected the canvas to append the atom you just selected.

Charge

"" = Increase Consign

"" = Decrease Charge

 To add surgery change an atom's charge. The default charge is 0.

To increase the send on an atom:

  1. Click the Gain Charge button.
  2. On the analyze, click happening the atom to which you wish to increase the charge.
  3. Continue to click, until you see the charge measure you wishing.

To decrease the charge on an atom:

  1. Click the Drop-off Charge button.
  2. On the canvas, click on the spec to which you want to decrease the charge.
  3. Go forward to click, until you see the charge value you want.

Surrogate method to increase or decrease the charge:

  1. Dog either the Increase or Decrease Charge button.
  2. Click the atom on the canvas.
  3. Type the tutelage, such as 2 or -1.

Negatron Dot

"" = One Electron

"" = Ii Electrons

To property electron-dit pairs OR single electrons on an particle. The default is two electrons (negatron pair).
  1. Click the One Negatron or Cardinal Electrons button.
  2. Click to add the electron(s) to the atom of your choice on the canvas.

To change the position of negatron(s):

With the electron dot clit active, click the electron(s) on the canvas, and drag to spread ou them more or less the particle.

World-shaking: Adding ii single electrons in a lottery is Non the same arsenic adding an negatron pair.

Eraser

""

To delete parts of molecules.

To erase entirely of your work at once: Click the Reset push button (described below).
  1. Clink the Eraser button.
  2. Click a molecule part (bond, atom, charge, operating theater electron) on the canvas to delete it.

Note: If you click an atom with the Eraser release active, any associated bond is too deleted.

Reset

""

Clears the sheet to its starting point, whether it was blank or controlled portions of a particle.

To erase just a portion of your cultivate: Use the Eraser button (described higher up).

 Click the Reset button to return the poll to its original state.

Tips for working with the Lewis Bodily structure Drawing Tool

  • The active button is outlined in blue.
  • The identification color for building block parts you select depends happening the active button. If the Select push is active, selections are green. If the Highlight (checkmark) button is hands-on, selections are juicy.
  • For "select" questions, employment the Highlight button to select correct atoms.
  • You send away't use copy and paste keyboard commands (Ctrl + C and Ctrl + V) to copy and spread unit elements on the canvas.

Copying expressions and answers into the answer box

The answer string generated depends on the parameters that are set. Make predictable the parameters are correct before generating the answer string with get do cosmic string , as described at a lower place.

  1. When you're done creating the correct expression, moral-click the canvas and choose pay off castigate construction.
  2. In the Item Editor, click add correctExpression and paste (Ctrl + V) the data into the loge.
  3. In the Lewis Structure Drafting Tool, right-click the sail and choose get solution string.
  4. In the Item Editor, spread (Ctrl + V) the information into the Correct Answer(s) box.
  5. In the Lewis Structure Drawing Tool, alter the molecule as needed for an incorrect answer.
  6. Mighty-click the canvas and choose get answer string.
  7. In the Item Editor, click add expression beside Wrong Answer(s), and paste (Ctrl + V) the information into the box.

See also:

Creating assets that contain atoms or molecules

Select corpuscle example

Chiral molecular drafting example

Grading chiral molecules

Draw a Lewis Structure Tool

Source: https://help.pearsoncmg.com/mastering/authoring/adv_editor/about_ans_types/coding/sol_app_flash/lewisdraw.htm

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