Electronegativity worksheets.

Hello Everyone! 

In todays wonderful chemistry class we worked on the three worksheets that we had to do over the weekend! 

Just in case you missed out on some of the questions, here are the answers : 

Worksheet 1 : Determining Electronegativity difference and Percent Ionic Character. 

1. a) 2.23 b) 1.27 c) 0.58 d) 1.26 e) 0.68

2. (A) Na and Cl would be considered ionic. 

3. % ionic character, electronegativity difference - direct relationship 

4. a) 70% b) 36% c) 10% d)33% e)12% 

5. ionic percent + covalent percent = 100 

6. a) 30% b) 65% c) 90%  d) 67%  e) 88%

Worksheet 2: Section 6.3 Periodic Trends 

1. (C) 2. (C) 3. (D) 4. (B) 5. (A)  6. (A) 

7. Ionization energy is the energy required to remove an electron from a gaseous atom. 

8. A high ionization energy value is not likely to form a positive ion because it has a strong hold on its electrons. 

9. first ionization energies increase as you move from left to right across a period because as you go across the period, the nucleus hold on to its electrons more tightly. 

10. In a group, first ionization energies decrease as you move down a group. This decrease in energy happens because atomic size increase as you move down the group. The valence electrons farther from the nucleus, less energy is required to remove them. 

11. * don't have. 

12. It indicated the relative ability of its atoms to attract electrons in a chemical bond. 

13. Electronegativy increase as you move from left to right across a period and decrease as you move down a group. 

Worksheet 3: Section 9.5 Electronegativity and Polarity

1. Its the ability to attract electrons in a chemical bond. 

2. Fl,  3.98,  Halogens,  group VII A 

3. Fr,  0.7,  Alkali metals,  group I A 

4. Group -> decreases Period -> increases 

5.  > 1.70 = ionic bond  < 70 =" covalent">

6. True

7. False 

8. (C) 9. (D) 10. (B) 11. *don't do*  12. (C) 13. (B)

14, 15, 16, 17.  *don't do* 

Here are the answers to our awesome and fun worksheet! =) 

After going over the worksheets we got a review that is needed to be done by tomorrow! 

Make sure that everyone studies because the test will be on WEDNESDAY, OCTOBER 22 2008! 

GOOD LUCK EVERYONE! =) 

next scribe is...  M