Beyond the fact that the radio-elements were in present course of evolution, it added little to the conceptions of chemistry. But in the second and more recent phase—concerned with the chemical ...

Iranian cargo ships allegedly carrying chemicals to make missile propellent are setting sail from China to deliver the shipment to Tehran's army.

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

A chemical element is one of those squares on the periodic table that adorns many a classroom wall. Sure. But what is an element really? It is a more subtle question that you might realise.

The answer, at first, is boring: it’s a simple no. But the reasons why you cannot are complex and varied – some come from the ...

Every element is made up of its own type of atom. This is why the chemical elements are all very different from each other. Everything in the universe contains the atoms of at least one or more ...

These elements, which are the constituents of immense ... unless they are restrained by chemical combination. They then collect around the great centers of attraction constituted by the stars ...

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A soldier assigned to a chemical defense element of a brigade under the Chinese PLA 73rd Group Army directs a military ...