PPT-Atomic Theory: Why do we believe in atoms?

Dr John Mitchell ID1004 Approaches to Reality For Years People Wondered What is the World Made of What is Matter I s Water Made of the Same Stuff as Rock Is Matter Continuous Is Matter Continuous. Section 4.2. Objectives. State the three . subparticles. of atoms. State the charges of the . subparticles. Describe the composition of an atom. Atom. Fundamental particles which make up matter. The smallest particle of an element that retains (keeps) its identity in a chemical reaction. , Austin. Dalton’s Atomic theory. John . D. alton (1766-1844) developed an atomic theory that proposed that atoms were responsible for the combinations of elements found in compounds.. Who was he?. The Building Blocks of Matter. Chapter 2. Chapter Outline. 2.1 The . Rutherford Model of . Atomic Structure. 2.2. . Nuclides and Their Symbols. 2.3 . Navigating the Periodic Table. 2.4 The . Masses of Atoms, Ions, and Molecules. Chemistry. Learning Goals . To be able to . explain and draw atomic structure. Elements. Elements are the . building blocks. of all . matter. on Earth. Elements are made up of . atoms. Differences in . There are about 100 different types of atoms. An element is a substance which contains only one type of atom. Atoms. Atoms. The Periodic Table. The Periodic Table. Element, Compound, Mixture. Element, Compound, Mixture. Atomic Theory Timeline . Scientific knowledge builds on past research and experimentation.. Democritus. 400 B.C.. Information. Atomic Model. Analogy. Democritus, a philosopher in ancient Greece,. . began the search for a description. Matter and Atoms. Matter is anything that takes up space and has mass. There are 4 phases of matter solid, liquid, gas, and plasma.. All matter is made of atoms.. Atoms are the building blocks of matter, sort of how bricks are the building blocks of houses.. Chapter 3. Types of Models – Why do we use models?. Physical Model vs. Conceptual Model. Physical model. is a representation of a very large or small object shown at a convenient scale. . Science is based off of observations.. A Scientific Law is a summary of what is seen in observations. . A Scientific Theory is an explanation of why these observations are occurring.. Both laws and theories are tested by using them to predict what would happen in certain situations.. Atomic Mass. What is an elements atomic mass?. The weighted average of its naturally occurring isotopes. .. When looking at an element on the periodic table of elements, where is atomic mass found?. Usually the top left hand corner of each elements box. However, on the periodic table that you will use for your AP Exam(s), this number will be located below each elements chemical symbol.. Atoms and the Periodic Table Atomic Structure ATOM: the smallest particle that has the properties of an element. From the early Greek concept of the atom to the modern atomic theory, scientists have built on and modified existing models of the atom. Daltons Atomic Theory. 1. All elements are composed of tiny . indivisible. particles called atoms.. 2. Atoms of the same element are identical. The atoms of one element are different from the atoms of another element.. DE Chemistry. Dr. Walker. Timeline. B.C.. 400 B.C. . Demokritos. and . Leucippos. . use the term ". atomos. ” . 1500's. Georg Bauer: systematic metallurgy. Paracelsus: medicinal application of minerals. In your notes…. Draw a model of an atom that best represents each component of that atom.. Foundations of Atomic Theory. Particle Theory of Matter. Democritus in 400 B.C.. Stated that nature’s basic particle was the atom (“indivisible” in Greek). .