higherPeriodic Trends Worksheet - Faculty Access for the Web

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Periodic Trends Worksheet

Directions:Use your notes to answer thefollowing questions.

1.What is atomic radius?

2. Rank the following elements by increasing atomic radius: carbon,aluminum,oxygen,potassium.

3. Define Ionization energy.

4.Why is the second ionization energy always larger than the first?

5.Why does fluorine have higher ionization energy than iodine?

6.What are valence electrons?

7.Why do elements in the same family generally have similar properties?

8. Indicate whether the following properties increase or decrease from left to right across the periodic table.a. atomic radius (exc luding nob le gases)b. first ionization energy

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9.What trend in atomic radius occurs down a group on the periodic table?What causes this trend?

10.What trend in ionization energy occurs across a period on the periodic table?What causes this trend?

11.Circle the atom in each pair that has the largest atomic radius.a. Al or Bb. Na or Alc. S or Od. O or Fe. Br or Clf. Mg or Ca

12. Circle the atom in each pair that has the greater ionization energy.a. Li or Beb. Ca or Bac. Na or Kd. P or Are. Cl or Sif. Li or K

13.Which ofthe following in each pair has the larger atomic radius?

1. LiorK

________

2. Ca orNi

________

3. Ga or B

________

4. O or C

________

5. Be or Ba

________

6. SiorS

________

7. Fe or Kr

________

14.Which ofthe following in each pair has the larger ionization energy?

1. LiorK

________

2. Ca orNi

________

3. Ga or B

________

4. O or C

________

5. Be or Ba

________

6. SiorS

7. Fe or Kr

________

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15.Which ion will have the smaller atomic radius?

1. K+or O2-

2. Ba2+or I-________

3. Al3+or Cl-________

4. K+ or Ca+2 ___

5. P-3 or S2-_____________

16.Why is the last answer S2-?Explain

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