This element Valency PDF is a downloadable version of the Valences of the Elements table. Download PDF As in the table, the most common valences are in BOLD text where values in italics are theoretical values based on periodic table trends. This table requires three sheets of paper to print. […]

# charge

Coulomb force is the force of either attraction or repulsion between two charged bodies. The force is related to the magnitude and charge on the two bodies and the distance between them by Coulomb’s Law: where q1 and q2 is the amount of charge in Coulombs r is the distance in […]

## Coulomb Force Example Problem

Coulomb’s Law is a force law between charged bodies. It relates the force to the magnitude and charge on the two bodies and the distance between them by the relationship: where q1 and q2 is the amount of charge in Coulombs r is the distance in meters between the charges […]

## Coulomb’s Law Example Problem

Polyatomic ions are ions that contain more than one element. This polyatomic ions list contains many common polyatomic ions grouped by charge. Each entry contains the ion’s name, molecular formula and chemical structure. +1 Polyatomic Ions Ion Formula Structure Ammonium NH4+ Hydronium H3O+ -1 Polyatomic Ions Ion Formula Structure Acetate C2H3O2– […]

## Polyatomic Ions List

September 14 is Charles François de Cisternay du Fay’s birthday. Du Fay was a French chemist who made early contributions to the study of electrical charge. Du Fay discovered there were two types of electric charge. He named these charges after the methods he used to separate them. Vitreous (Latin […]

## Today In Science History – September 14 – Charles François ...

August 23 marks the passing of Charles-Augustin de Coulomb. Coulomb was a French military engineer known for his work with static electricity. Coulomb is best known for Coulomb’s law. This law is a statement of the force between two electric charges being inversely proportional to the square of the distance […]