Jöns jakob berzellus _.
developed atomic theory
created the periodic table of elements
proposed the planetary atomic model
invented the chemical notation system

Jöns Jakob Berzellus _

Invented the chemical notation system

Explanation:

Meaning of chemical notation : It is the representation of chemical composition of element by symbols.

Berzelius was the first person to measure accurate atomic weight of the elements, which helped to confirm Dalton's Atomic Theory.

He described how chemical bonds are formed by electrostatic attraction.

Berzelius, work with atomic weight and his theory of electrochemical dualism led to the development of Chemical notation that decide the chemical notation of the compounds.This chemical notation determines about the element both qualitatively and quantitatively.

He identified that compounds can be distinguished by the opposing constituents which are the acidic constituent , the basic and the neutral part.

This formula representation is given by Berzelius.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: