The number of protons in an atom of any given element is always the same. Physicists call this the atomic number.So, in the above example of lead, its atomic number is 82 and that does not change ...

there are 8 protons in the nucleus of every oxygen atom; no other element has atomic number 8; A second number is needed to fully describe an atom. This number is called the mass number.

And here's where J.J. earned his Nobel Prize: These "corpuscles" (his word) were about 2,000 times smaller than hydrogen, the lightest known element and therefore the smallest atom.

Using SX-STM, the authors successfully detected the electron arrangement within two different atoms: one of iron; and another of terbium, a rare-earth element (number 65) that’s often used in ...

The modern version of this chemical element chart has been tweaked to account for the quantum theory that governs the arrangement of electrons surrounding the nucleus and the outermost electrons that ...

Michael Thoennessen at Michigan State University says this experiment strengthens the case for the feasibility of creating element 120. “You have to do the groundwork and feel your way up to it ...

It’s also a surprisingly common element that plays a crucial role in modern energy ... In fission, the nucleus of the atom splits into two or more nuclei, which releases large amounts of energy.