CHEM 1301 Chapter Notes - Chapter 4.1: Intensive And Extensive Properties, Robert Andrews Millikan, Atomic Number

• School: University of Manitoba
• Department: Chemistry
• Course: CHEM 1301
• Professor: Sarrah Vakili

Document Summary

Key points: atoms have mass and occupy volume. Atoms contain a positive nucleus and negative electrons. Substances are in their simplest identifiable form at the atomic, ionic, or molecular level. Further division produces a loss of characteristic properties. All the explanations of chemical phenomena are expressed in terms of atoms. The structure of atoms can be understood in terms of quantum mechanics, the theory of matter, in which the properties of particles and waves merge together. Matter possesses mass, so atoms possess mass. Re(cid:272)og(cid:374)ize i(cid:374) joh(cid:374) dalto(cid:374)"s ti(cid:373)e atoms are simple units of matter, and molecules are units of matter consisting of combinations of atoms. The first two parts of daltons theory were later proven incorrect. Proposals 3,4 and 5 are still accepted today. Daltons theory was an important step in further development of atomic theory. Daltons postulate that atoms are indivisible was disproved about a century ago.