Search -
The World of Elements and Their Properties: Physical Science (Science Readers)
The World of Elements and Their Properties Physical Science - Science Readers Author:Lynn Van Gorp, M.S. There are 90 different elements, like the oxygen that we breathe, that can be found in nature. When two or more elements combine, they are held together by a chemical bond and form a compound. In 1869, chemist Dmitri Mendeleev organized the elements into a chart that is known as the Periodic Table of Elements.