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Is our world the best of all worlds?
Is the world tailor-made for humans? Would there be another world with us
could be possible? The central question is therefore whether our world is the best of all worlds (see figure 1). On the occasion of the 500th anniversary of Copernicus, the …Translated by
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Flame tests with tea light holders
Metal salts dissolved in methanol color beautifully in the flame. These are very simple
experiments that can also be carried out by students under supervision.Translated by
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Between natural magic and science
Van Helmont is a seeker for the truth between magic and what we now call science, between alchemy and chemistry. Van Helmont's story is a source of inspiration for anyone interested in the evolution of thinking about the workings of nature.
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The discovery of atoms of electricity
The history of the discovery of the electron goes back to the search for the
properties of amber. Several scientists contributed to the creation of a scientific climate in which it became possible to discover the electron. This scientific history can …Translated by
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Collaborator/dialogue: Giving feedback
This sheet is a translation of Competency Pictures: Towards the classroom with artistic competencies and answers the question: how can you translate the competency picture Collaborator/dialogue: giving feedback to the four grades in which you teach …
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Collaborator/dialogue: Show respect for others and his work/enter into a dialogue
This sheet is a translation of Competency Pictures: On the way with artistic competences to classroom practice and provides an answer to the question: how can you develop the competency picture Collaborator/dialogue: showing respect for others and …
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Collaborator/dialogue: Collaborate and create together
This sheet is a translation of Competency images: On the way with artistic competences to classroom practice and provides an answer to the question: how can you translate the competence image Collaborator/dialogue: working together and making …
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The critical micelle concentration of sodium dodecyl sulfate
The determinations of the critical micelle concentrations (cmc) for ionic surfactants using specific conductivity measurements are excellent research projects for students and pupils to gain insight into some properties of substances in solution. …
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Giving an extra dimension to classic equilibrium tests
Chemical equilibrium is a difficult topic theoretically. By studying the complexation reactions in an aqueous solution of a copper salt with hydrogen chloride and with ammonia, it can be made clear that there is a single reaction system.
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Experiment with copper nanoparticles to show color changes
In this contribution, we discuss a student project where copper nanoparticles were prepared by reducing copper (II) sulfate using sodium borohydride. The use of iodide ions provides the necessary stabilization of the nanoparticles formed. The …
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Atomic orbitals of hydrogen
Visualizing atomic orbitals of hydrogen using parametric equations.
Atomic orbitals are not a standard subject in secondary chemistry education in the Netherlands and Flanders. Teachers do pay attention to this subject. Simplified artistic …
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The discovery of argon and the importance of accurate data analysis
John William Strutt, third baron of Rayleigh (1842-1919), is one of the most impressive figures in the history of the natural sciences. He is best known for his explanation of the blue color in the sky caused by Rayleigh scattering. It is less …
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