Add the charge to the atomic number for negative ions. When an ion has a negative charge, the atom has gained electrons. To calculate the total number of present electrons, you simply add the amount of extra charge to the atomic number. In the case of a negative ion, there are fewer protons than electrons.
Definition: Expressionism is a term used to describe a movement of the early 20th century (c.1905-20) that was most prominent in Germany and Austria.The aims of an Expressionist were to express emotions through the use of vivid colors and strong, distorted lines, rather than capturing a likeness or reality.xpressionism is the opposite of Impressionism, which emphasized painting what the artist observed. The work of Vincent van Gogh had a lot of influence on artists who are now classified as Expressionists. See Also: 1  How to Paint Like an Expressionist. 2  Exhibition Photos: Vincent van Gogh and Expressionism.
Abstract expressionism. Abstract expressionism is the term applied to new forms of abstract art developed by American painters such as Jackson Pollock, Mark Rothko and Willem de Kooning in the 1940s and 1950s, often characterized by gestural brush-strokes or mark-making, and the impression of spontaneity.