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 ...

For example, the atomic number of chlorine is 17. Every chlorine atom has 17 protons and 17 electrons. It has 17 positive charges and 17 negative charges, meaning that it is neutral overall.

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.

A chlorine atom can react with ozone to form an oxygen molecule (O2) and a molecule of chlorine monoxide (ClO), and the chlorine atom is “regenerated” when the chlorine monoxide molecule reacts with ...

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 ...

chlorine is less reactive than fluorine because the outer electrons in a chlorine atom are further from the nucleus than the outer electrons in a fluorine atom. It is harder for a chlorine atom to ...

The electrons in the covalent bond are shared equally between the two oxygen atoms. The chlorine atom has a higher electronegativity than the hydrogen atom, so the bonding electrons will be closer to ...