Category Archives: Chemistry

In the standard representation of the periodic table, we find below two separated rows of elements. Their chemistry and electronic configuration belong to a group three element, so what these two separated rows really mean is that in this representation […]

The role of molecular hydrogen (dihydrogen) in reactions of organic and inorganic chemistry is very well known . One can mention numerous reactions playing the key role in biochemistry, like for example processes in microorganisms, or the commonly known addition […]

We are all familiar with rust. Rust is an iron oxide, usually red, formed by the reaction of iron and oxygen in the presence of water or air moisture, and it is a clear sign of metal corrosion by oxidation. […]

The current in a semiconductor consists of two parts: the negatively charged electrons in the conduction band and the positively charged holes in the valence band. Although the number of electrons in the conduction band is equal to the […]

Organic small molecules are essential for many different fields, from medicine to technology: Most of the drugs we take, biological probes and the constituents of solar cells, to name but a few, are small organic molecules. (Figure 1) . However, […]

No matter how the layout of the periodic table may be, there are elements that are always grouped together. This is easy to understand; let’s take for example the standard form of the table (due to H.G. Deming). In this […]

Imagine that you enter a room full of a poisonous gas wearing a mask that is not good enough to prevent the gas reaching your lungs and killing you. The mask is not good enough because it would allow […]

Author: Kepa Ruiz-Mirazo, Permanent Researcher, University of the Basque Country (UPV-EHU). . Although «cracking the origins-of-life puzzle», regardless of the reputation of the journalist who tells the news, is clearly not within the reach of science quite yet, the article published […]

“In the beginning, there was simplicity”. Richard Dawkins, “The selfish gene”, chapter 2. . The question of how life began on Earth is as old as the human race and has occupied the thoughts and time of scientists and philosophers […]

A quantum dot is a nanometric crystalline structure of semiconductor materials. In a quatum dot electrons are confined in a region of space, thus creating a well defined structure of energy levels that depends very much on the size […]