Chemical reactions occur when elements or compounds combine and create new compounds. Elements are substances that contain only one type of atom and are represented by unique symbols on the periodic ...
Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom. Iron is an ...
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Earth's oxygen boom: How nickel and urea in early oceans shaped microbial life and set the stage
The appearance of oxygen in Earth's atmosphere was a turning point in the history of our planet, forever transforming the ...
Compounds emitted by trees, diterpenes, could have a previously unconsidered impact on the formation of particles in the ...
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