"There must be something in the water!" is something many of us have probably observed at some point. To scientists, though, ...

The reaction releases a lot of heat as the ionic compound sodium chloride is formed. A sodium and chlorine atom are near each other. An electron from each atom feels the attraction from the other atom ...

An element's atomic number defines it. An element with 17 protons will always be chlorine. However an element's mass numbers can vary, which means that it can have different numbers of neutrons.

Scientists have identified the byproduct of a chemical used to disinfect tap water and prevent waterborne illnesses.

It also tells us that chlorine has 18 neutrons (35 - 17) and, as the number of electrons and protons are equal in a neutral atom, chlorine also has 17 electrons. The relative mass of a nucleus is ...

Chlorine, a low-cost and highly effective disinfectant, is the most widely used chemical for steralising drinking water ...

CFCs had been pumping out since the 1930s up until the Montreal Protocol. Paul Newman, the leader of NASA‘s ozone research team and chief scientist for earth sciences at NASA’s Goddard Space Flight ...

The atoms in the reactants are: 1 calcium atom, 2 chlorine atoms, 2 sodium atoms, 2 hydrogen atoms, 2 carbon atoms, and 6 oxygen atoms The atoms in the products are: 1 calcium atom, 2 chlorine atoms, ...

But the logic of the periodic table also relies upon the number and organisation of electrons in an atom. Let’s take chlorine as an example. It is positioned in group 7 of the periodic table ...