Atomic Theory and Scientists PDF Lesson

Atomic Theory and the Scientists 3rd Quarter Lesson 1 Early Theories of the Atom DEMOCRITUS Atom from Greek word “Atomos” indestructible and indivisible particle. Early Theories of the Atom ARISTOTLE Matter was made up of four natural elements. Early Theories of th...

Atomic Theory and the Scientists 3rd Quarter Lesson 1 Early Theories of the Atom DEMOCRITUS Atom from Greek word “Atomos” indestructible and indivisible particle. Early Theories of the Atom ARISTOTLE Matter was made up of four natural elements. Early Theories of the Atom JOHN DALTON He wrote in his book A New System of Chemical Philosophy ATOMIC THEORY STATES THAT: 1. All matter is made of tiny, indivisible particles called atom. ATOMIC THEORY STATES THAT: 2. The atoms of an element are all the same. ATOMIC THEORY STATES THAT: 3. The atoms of different elements vary from one another. ATOMIC THEORY STATES THAT: 4. Atoms may form compounds when they are combined. CHECK-IN Complete the statements. ATOMIC THEORY STATES THAT 01 02 The atoms of All matter is an element are made of tiny, same all the _________ indivisible particles called atom _______. ATOMIC THEORY STATES THAT 03 04 Atoms may The atoms of form different ________ compounds _______________ elements vary when they are from one combined. another.  QUESTION Are you satisfied with how the atom looks today?  1. John Dalton Solid Sphere Model Atoms are indivisible.  2. J.J Thomson Plum Pudding Model The positive & negative charges are embedded within it. 3. Ernest Rutherford – Nuclear Model Electrons orbiting in a path around the positive charges.  4. Niels Bohr - The Planetary Model Electrons are arranged in concentric circular orbits around the nucleus.  MATCHING TYPE Column A Column B 1. John Dalton A A. Atoms are indivisible. 2. Aristotle E B. Atomos 3. J.J Thomson F C. Planetary Model 4. Niels Bohr C D. Nuclear Model 5. Democritus B E. Water, Fire, Earth, Air 6. Ernest Rutherford D F. Plum Pudding Model  KEY WORDS Enumerate key words used in today’s lesson. Individual Activity - Homework Draw your own atomic model. Label and describe its parts. nucleus, electrons, protons, neutrons. (handwritten – bondpaper) Deadline – tomorrow Thursday