CK-12 Physical Science - For Middle School

5.1. Inside the Atom http://www.ck12.org FIGURE 5.2 This model shows the particles that make up a carbon atom. Atomic Forces Whe ...

http://www.ck12.org Chapter 5. Atoms total mass in atomic mass units. Two numbers are commonly used to distinguish atoms: atomic ...

5.1. Inside the Atom http://www.ck12.org FIGURE 5.5 When a fluorine atom gains an electron, it becomes a negative fluoride ion. ...

http://www.ck12.org Chapter 5. Atoms FIGURE 5.6 All isotopes of a given element have the same number of protons (P), but they di ...

5.1. Inside the Atom http://www.ck12.org learned about these tiny, fundamental particles of matter. They are very difficult and ...

http://www.ck12.org Chapter 5. Atoms Apply Concepts If an atom gains electrons, it becomes an ion. Is the ion positively or neg ...

5.2. History of the Atom http://www.ck12.org 5.2 History of the Atom Lesson Objectives State Democritus’s ideas about the atom. ...

http://www.ck12.org Chapter 5. Atoms the idea of atoms was ridiculous. Unfortunately, Aristotle’s ideas were accepted for more t ...

5.2. History of the Atom http://www.ck12.org All atoms of the same element are alike and have the same mass. Atoms of different ...

http://www.ck12.org Chapter 5. Atoms FIGURE 5.10 This sketch shows the basic set up of Thomson’s experiments. The vacuum tube is ...

5.2. History of the Atom http://www.ck12.org FIGURE 5.11 Thomson’s atomic model includes neg- ative electrons in a "sea" of posi ...

http://www.ck12.org Chapter 5. Atoms FIGURE 5.12 Rutherford shot a beam of positive alpha particles at thin gold foil. He compar ...

5.2. History of the Atom http://www.ck12.org Lesson Summary Around 450 B.C., the Greek philosopher Democritus introduced the id ...

http://www.ck12.org Chapter 5. Atoms 5.3 Modern Atomic Theory Lesson Objectives Define energy levels. Describe the electron clo ...

5.3. Modern Atomic Theory http://www.ck12.org FIGURE 5.14 In Bohr’s atomic model, electrons orbit at fixed distances from the nu ...

http://www.ck12.org Chapter 5. Atoms FIGURE 5.16 Atoms in fireworks give off light when their electrons jump back to a lower ene ...

5.3. Modern Atomic Theory http://www.ck12.org FIGURE 5.17 This sketch represents the electron cloud model for helium. What does ...

http://www.ck12.org Chapter 5. Atoms Lesson Review Questions Recall What are energy levels? Which energy level has the smallest ...

5.4. References http://www.ck12.org 5.4 References Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0 Christopher Auyeung. CK- ...

http://www.ck12.org Chapter 6. Periodic Table CHAPTER 6 Periodic Table Chapter Outline 6.1 How Elements Are Organized 6.2 CLASSE ...