There are lots of different substances but only just over a hundred elements. An element is a substance that is made up of only one kind of atom. The atoms in a particular element are the same as ...

Matter is made up of very small parts called atoms. Atoms can combine in different numbers and in different ways to make different molecules. Atoms and molecules make up all of the different ...

Students then see an animation to help explain that the substances are made of different atoms and molecules, so they dissolve differently. Other than tasting the salt and sugar, what test could we do ...

But in atoms with unpaired electrons in their outer shells, there’s nothing to cancel out the magnetic moments, which means these elements are magnetic. These elements tend to come from two ...

We also, confusingly, tend to refer to pure substances made of one kind of atom, like chlorine gas, as elements. But these are very different from the isolated atoms depicted on the periodic table.

They are formed of simple molecules or individual elements arranged in repeating ... Diamonds, made of carbon atoms, are the hardest natural substance found on Earth. Formed under extremely ...

Researchers are opening up new horizons in chemistry: They present the world's first triple bond between the atoms boron and carbon. Boron, carbon, nitrogen and oxygen: these four elements can ...

Condensed-matter physics is the study of substances in their solid ... for complex systems that involve multiple elements or a large number of atoms presents a formidable challenge in ...

Atoms with a full outer shell are stable, but free radicals are unstable, and in an effort to make up the number of electrons in their outer shell, they react quickly with other substances.