Embed Size (px)
DESCRIPTION
Word Bank bounce back electrons Directions Answer each question on the lines. Use complete sentences. 14. Which atom contains no neutrons in the nucleus? 13. What was the problem before the neutron was discovered? Neutron 15. How is Bohr’s model different from Rutherford’s? Chemistry 9.110×10 –28 Inside nucleus 12. 10. alpha particles nuclei 11. Workbook Activity 8. 9. 7. © Pearson AGS Globe. Permission is granted to reproduce for classroom use only.
Citation preview
© Pearson AGS Globe. Permission is granted to reproduce for classroom use only. Chemistry
Directions Use the terms in the Word Bank to complete the paragraph. Write the terms on the lines.
Ernest Rutherford sent a beam of 1. ______________, or helium nuclei, at a piece of gold foil. He expected the particles to 2. _______________. A few of them appeared to 3. _______________ at odd angles. Rutherford decided atoms must contain 4. _______________, small dense centers containing 5. _______________. (Neutrons were discovered later.) Rutherford proposed that the rest of the atom is empty space and 6. ______________.
Directions The table compares the subatomic particles of an atom. Complete the table.
Particle Symbol Charge Mass (g) Location
Electron e− 7. 9.110×10–28 8.
9. p+ 1+ 10. Inside nucleus
Neutron 11. 0 1.675×10–24 12.
Directions Answer each question on the lines. Use complete sentences.
13. What was the problem before the neutron was discovered?
14. Which atom contains no neutrons in the nucleus?
15. How is Bohr’s model different from Rutherford’s?
Later Atomic Theories
Name Date Period Workbook Activity
Chapter 8, Lesson 2 49
Word Bank
alpha particles
bounce back
electrons
nuclei
pass through
protons
