The modern periodic table has its elements listed in the order of their increasing atomic number. The atomic number is the number of protons that are present in the nucleus of the atom. It is the ...

The atomic number (also known as the proton number) is denoted by the letter ‘Z’ and represents the number of protons present in an atom’s nucleus. It determines an element’s position in the periodic ...

Atomic mass is a fundamental concept in chemistry and physics, helping us better understand the behavior of elements and isotopes. It also serves as a basis for numerous calculations involving ...

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 ...

Chlorine naturally exists as two isotopes, \(_{17}^{35}\textrm{Cl}\) (chlorine-35) and \(_{17}^{37}\textrm{Cl}\) (chlorine-37). The abundance of chlorine-35 is 75% ...

Blackboard inscribed with scientific formulas and calculations... Blackboard inscribed with scientific formulas and calculations in physics and mathematics. Can illustrate scientific topics to quantum ...

Update: This article was updated on Sept. 11, 2017 by Rachel Ross, Live Science Contributor. Imagine plopping an atom down on a scale. As you do so, skin cells that are trillions of atoms thick flake ...

Potassium on periodic table of the elements. Alkali metal with symbol K from Neo-Latin kalium, and with atomic number 19. Essential for all living cells. Good sources are fresh fruits and vegetables.

Atomic resolution transmission electron microscopy (TEM) has opened up a new era of molecular science by providing atomic video images of dynamic motions of single organic and inorganic molecules.