Molar Mass of Molecules

December 5, 2014

Calculate the molar mass of a molecule:

The notation for the chemical formula is a little funky: you put the element symbol and then the number of atoms separated by a colon; each element/number of atoms pair are separated by commas, so sodium chloride (NaCl) would be “Na:1,Cl:1“.

This will have to do until I can write something to parse the regular chemical formula notation.

On the plus side, you can link to a specific molecular mass calculation by adding the formula to the url. So magnesium chloride (MgCl2) can be found with this url:

http://soriki.com/js/chem/chem_db/molecular_mass.html?formula=Mg:1,Cl:2

Citing this post: Urbano, L., 2014. Molar Mass of Molecules, Retrieved May 29th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

Updated Atom Builder

September 5, 2014

A couple of my students asked for worksheets to practice drawing atoms and electron shells. I updated the Atom Builder app to make sure it works and to make the app embedable.

So now I can ask a student to draw 23Na+ then show the what they should get:

Worksheet

Draw diagrams of the following atoms, showing the number of neutrons, protons, and electrons in shells. See the example above.

  1. 14C: answer.
  2. 32K+: answer.
  3. 18O2-: answer.
  4. 4He2+: answer.
  5. 32P: answer.

I guess the next step is to adapt the app so you can hide the element symbol so student have to figure what element based on the diagram.

Citing this post: Urbano, L., 2014. Updated Atom Builder, Retrieved May 29th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

Biochemical Art

November 23, 2013

Hydrophobic art.

The art of hydrophobia.

A beautiful demonstration of the interaction between detergents and fats (in milk). The food coloring acts as a tracer.

Citing this post: Urbano, L., 2013. Biochemical Art, Retrieved May 29th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

3d Molecule Viewer

July 23, 2013

An excellent 3d viewer for molecules.

An excellent 3d molecule viewer. (The actual app has a lot smoother animations than this.)

An excellent 3d molecule viewer.

In addition to the existing molecules, you can import any number of others if you can find them in one of the right formats (PDB, SDF or MOL molecule definitions): the ligand.info: Small Molecule Meta Database is a good source for SDFs.

Citing this post: Urbano, L., 2013. 3d Molecule Viewer, Retrieved May 29th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

Pictures of Molecules

May 31, 2013

Following closely after the first pictures of atoms we now have pictures of molecules reacting:

Carbon rings combine. Image by Lawrence Berkeley National Laboratory and University of California at Berkeley via phys.org.

Citing this post: Urbano, L., 2013. Pictures of Molecules, Retrieved May 29th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

Pictures of Hydrogen Atoms

May 25, 2013

Pictures of the electron cloud surrounding hydrogen atoms. This is an aggregate picture that shows the electron shells. Image from Aneta Stodolna/FOM Institute AMOLF.

The electron cloud surrounding an hydrogen atom shows the shells quite nicely. Via Science.

Citing this post: Urbano, L., 2013. Pictures of Hydrogen Atoms, Retrieved May 29th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

A Movie in Atoms

May 2, 2013

A neat stop-motion movie made by manipulating individual atoms.

This is a great spark-the-imagination video because you can use it to talk about the physics of atoms and molecules, and what is temperature — they had to cool the atoms down to 4 Kelvin to keep them from moving too much.

How they did it:

More detail from Slate, and NPR:

Citing this post: Urbano, L., 2013. A Movie in Atoms, Retrieved May 29th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

Pictures of Atoms and Molecules

April 25, 2013

A look into the imaging of large molecules (chromosomes) and the arrangement of atoms in really small particles.

Citing this post: Urbano, L., 2013. Pictures of Atoms and Molecules, Retrieved May 29th, 2017, from Montessori Muddle: http://MontessoriMuddle.org/ .
Attribution (Curator's Code ): Via: Montessori Muddle; Hat tip: Montessori Muddle.

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