Opinions on Abundance of the chemical elements

Here you have a list of opinions about Abundance of the chemical elements and you can also give us your opinion about it.
You will see other people's opinions about Abundance of the chemical elements and you will find out what the others say about it.
Also, you will see opinions about other terms. Do not forget to leave your opinion about this topic and others related.



The abundance of a chemical element measures how relatively common (or rare) the element is, or how much of the element is present in a given environment by comparison to all other elements. Abundance may be variously measured by the mass-fraction (the same as weight fraction), mole-fraction (fraction of atoms by numerical count, or sometimes fraction of molecules in gases), or volume-fraction. Measurement by volume-fraction is a common abundance measure in mixed gases such as planetary atmospheres, and is close to molecular mole-fraction for ideal gas mixtures (i.e., gas mixtures at relatively low densities and pressures).

For example, the mass-fraction abundance of oxygen in water is about 89%, because that is the fraction of water's mass which is oxygen. However, the mole-fraction abundance of oxygen atoms in water is only 33% because only 1 atom of 3 in water is an oxygen atom. In the Universe as a whole, and in the atmospheres of gas-giant planets such as Jupiter, the mass-fraction abundances of hydrogen and helium are about 74% and 23–25% respectively, while the (atomic) mole-fractions of these elements are closer to 92% and 8%. However, since hydrogen is diatomic while helium is not, in the conditions of Jupiter's outer atmosphere, the molecular mole-fraction (fraction of total gas molecules, or fraction of atmosphere by volume) of hydrogen in the outer atmosphere of Jupiter is about 86%, and for helium, 13%.

Most abundances in this article are given as mass-fraction abundances.


In the image below, you can see a graph with the evolution of the times that people look for Abundance of the chemical elements. And below it, you can see how many pieces of news have been created about Abundance of the chemical elements in the last years.
Thanks to this graph, we can see the interest Abundance of the chemical elements has and the evolution of its popularity.

What do you think of Abundance of the chemical elements?

You can leave your opinion about Abundance of the chemical elements here as well as read the comments and opinions from other people about the topic.
It's important that all of us leave our opinions about Abundance of the chemical elements to have a better knowledge about it: