Draw Lewis structure answers

1. Select a common element from the toolbar, like  Hydrogen.

   To see more elements — If needed, select  Periodic Table to choose another element. Close the periodic table to return to the canvas.

2. Place the atom on the canvas, whether in a blank area or on top of another atom to replace it.

1. Select a bond type and an element from the toolbars.

   Tip: For a molecule with multiple bonds, it can be easier to select  Unspecified Atom from the bottom toolbar. Replace the X atoms later with the specific atoms you want.

   To see more elements —
   If needed, select  Periodic Table to choose an element. Close the periodic table to return to the canvas.

2. Point and drag on the canvas to place the bond with the same element at both ends.
3. Change one of the atom elements. (Optional)
   Deselect the active bond type from the toolbar. Then, select a different element from the toolbar and select the atom on the canvas to be replaced.

1. Choose  Select from the toolbar.
2. Select the atom you want to erase on the canvas so that it turns green.
3. Either press Delete from your keyboard or select  Erase.

   If the atom has a bond, the bond and any other connected atom will also be erased. This is true, even when only the atom is selected.

4. If you pressed Delete in step 3, deselect Select. If you chose the Erase tool, deselect it.

1. Choose  Select from the toolbar.
2. Select the atom on the canvas so that it turns green.
3. Move the atom. If the atom has a bond, the bond angle will also be moved.

1. Select a bond from the toolbar.
2. Drag the bond on the canvas, whether to attach it to one or more atoms, replace a bond, or place in a blank area.

   If attaching to atoms —
   Be sure that each atom becomes selected (turns green). Otherwise, the currently active atom from the controls will appear at both ends.

   If replacing a bond —
   Position the new bond over the bond on the canvas. For single, double, and triple bonds, continue to select the bond on the canvas, until you see the bond type you want.

   Placing the Wedge Bond or Dash Bond over the same bond reverses the direction of the wedge or dash bond.

1. Select a bond type and an element from the toolbars.

   Tip: For a molecule with multiple bonds, it can be easier to select  Unspecified Atom from the bottom toolbar. Replace the X atoms later with the specific atoms you want.

   To see more elements — If needed, select  Periodic Table to choose an element not shown on the toolbar. Close the periodic table to return to the canvas.

2. Point and drag on the canvas to place the bond with the same element at both ends.
3. Change one of the atom elements: (Optional)
   Deselect the active bond type from the toolbar. Then, select a different element from the toolbar and select the atom on the canvas to be replaced.

1. Choose  Select.
2. On the canvas, select the atom at the end of the bond you want to change.
3. Drag to lengthen or change the angle of a bond, as needed.

1. Choose  Select from the toolbar.
2. Select the bond you want to erase on the canvas so that it turns green.
3. Select  Erase.

   If the bond is connected to one or more atoms without other bonds, these are also erased.

4. When you’re finished, either select another control or deselect Erase.

1. Select either  Unpaired Electron or  Paired Electrons.

   Note: Adding two single dots on the canvas is NOT the same as adding an electron dot pair.

2. Select an atom on the canvas to position the electron(s), which display as one or two dots.
3. Select  Increase Charge or  Decrease Charge, as needed.

1. Select  Erase from the toolbar.
2. On the canvas, select the electrons you want to erase.
3. When you’re finished, either select another control or deselect Erase.

1. Draw the molecule you want to identify as an ion.
2. Select  Square Brackets.
3. On the canvas, select the molecule to enclose it in brackets.

1. Select  Erase from the toolbar.
2. On the canvas, select the ion brackets you want to erase.
3. When you’re finished, either select another control or deselect Erase.

The default charge of atoms is 0.

Increase the charge on an atom or bracket

1. Select  Increase Charge.
2. On the canvas, select the atom or bracket for which you want to increase the charge.
3. Continue to select, until you see the charge value you want. The maximum charge is 8+.

Decrease the charge on an atom or bracket

1. Select  Decrease Charge.
2. On the canvas, select the atom or bracket for which you want to decrease the charge.
3. Continue to select, until you see the charge value you want. The minimum charge is 8-.
   

1. Select  Erase.
2. Select the molecule part or parts (atom, bond, charge, or electron) you want to delete.

   If you added molecule parts in a single action, all parts are erased, such as a bond with two atoms.

3. To erase multiple parts:
   Point and drag around the parts you want to erase. When you stop, the parts inside the square or rectangle you drew will be erased.

4. When you’re finished, either select another control or deselect Erase.

• Select  Reset to return the canvas to its original state.
• To undo your last action only, select Undo.
• To erase parts of your drawing only, select Erase.