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Reading Guide 4 CHEM 101 Check here  if you want your paper returned Chapter 3 – Sections 3.4-3.7 Introduction to Chemistry Dr. Burris Printed Last Name: First Name: WKUID:

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1. Express in your own words the meaning of these terms: a. Spectrum

b. Ground State

c. Excited State

d. Quantum

e. Valence

f. Shell

g. Subshell

h. Orbital

i. Periodic

j. Insulator

k. Semiconductor

l. Noble Gas

m. Ion

n. Cation

o. Anion

2. What is the difference between a continuous spectrum and a line spectrum?

3. Who proposed the Shell Model of the hydrogen atom based on small energy steps between adjacent levels for electrons?

4. Which end of the electromagnetic spectrum is higher in ENERGY, -rays or radio waves?

5. Who proposed the mathematical wave theory that explained the existence of orbitals?

Reading Guide 4 CHEM 101 Dr. Burris Chapter 3 – Sections 3.4 – 3.7 Introduction to Chemistry Page 2

6. Give the general subshell filling order for electrons in ground state atoms.

7. Name one of the elements Mendeleev predicted to exist prior to its discovery.

8. Which are vertical columns on the periodic table, periods or groups?

9. Metals are generally found on which side of the periodic table, left or right?

10. Which have elements with similar chemical & physical properties, periods or groups?

11. Which groups (by number) are referred to as the “Main Groups” or representative groups?

12. How many nonmetals are there on the periodic table?

13. Based on the Lewis Dot Symbols in Table 3.5, predict the Lewis Dot Symbols for these elements: a. Strontium, Sr, atomic number 38

b. Selenium, Se, atomic number 34

c. Iodine, I, atomic number 53

14. In which direction on the periodic table, left to right or right to left, do the atomic radii of the elements generally increase?

15. In which direction on the periodic table, top to bottom or bottom to top, do the atomic radii of the elements generally increase?

16. The elements in Group 1 are referred to as Alkali Metals. What are the elements in Group 2 called? What are the elements in Group 17 called?