For the first time those little numbers that appear beneath some of the commonest elements in the periodic table boxes are about to change from a single value to an interval of numbers An ...

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications. When you purchase through links on our site, we may ...

What Are Atomic Orbitals: Atomic orbitals a concepts derived from quantum mechanics to describe the probability of finding an electron around an atom’s nucleus. The Orbtial Wave Function is a ...

We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. Sodium has a mass number of 23amu. Since sodium has 11 protons, ...

Of the four known fundamental forces of nature, the weak nuclear force is the one with the least obvious purpose. Gravity ...