A substance that contains polar covalent bonds may not be overall polar. This is due to the shape of the molecule. Water molecules are polar molecules. Both of the bonds inside the molecule are ...

This is what keeps the atom together. Electrons are attracted to the protons of other atoms. This is what causes atoms to bond and what holds a molecule together. Electrons can be shared unequally in ...

A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic ...

In a chemical bond, the more electronegative atom gains extra electrons, becoming negatively charged, while the less electronegative atom loses electrons and becomes positively charged. The difference ...

The ball-and-stick and first space-filling model show that sucrose is a large molecule made up of carbon, oxygen, and hydrogen. Sucrose has many O–H bonds which are polar. These polar areas are shown ...

The opposite is true if we want to make new bonds. Energy is released when new chemical bonds are formed, so bond making is an exothermic process. Breaking or making the same chemical bond will ...

The discovery was published 1 in Nature on 25 September. “The covalent bond is one of the most important concepts in chemistry, and discovery of new types of chemical bonds holds great promise ...

Articles which simply summarise research in the topic with minimal or no analysis or insight from the author are not suitable for publication in Chem Soc Rev. To achieve this goal we respectfully ask ...

Green Chemistry provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. Green Chemistry is at the frontiers of this ...

在这项工作中，研究组使用升级版日冕多通道偏振仪进行观测，提供了跨度为8个月的太阳翼上方全球日冕的114张磁场图。最终确定了日冕磁场随高度的分布，并监测了多次太阳自转过程中不同纬度的演变。

Alkenes - Nomenclature, structure of double bond (ethene), geometrical isomerism, physical properties, methods of preparation, chemical reactions: addition of hydrogen, halogen, water, hydrogen ...