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CHM113

Chapter 7 Resource Worksheets Resource 1: Electron Configuration of Ions

1. Write electron configurations for the following ions: Ion Na+ FN3Ba2+ Al3+ Cu+ BrPb2+

Electron Configuration

2. Identify which of the following ions from Question 1 have noble gas electron configurations. 3. Which of the ions in Question are isoelectronic?

4. For the following electron configurations choose 3 possible elements (or ions) they may represent a.1s2 2s22p6 3s23p6 4s2 3d10 4p3 b. 1s2 2s22p6 3s23p6 4s2 3d10 4p6 5s1 c. 1s2 2s22p6 3s23p6 4s2 3d1 d. 1s2 2s22p6 3s23p3 e. 1s2 2s22p5

Resource 2: Atomic Radii and Isoelectronic Series 1. Arrange the following groups of atoms in order of decreasing size. a. Group 16 elements b. Ca, Cr, Se c. C, Li, O d . N, Pb , P , Si , As e . C, Al , O,K 3. In each of the following pairs, circle the species with the larger atomic radius: Mg or Ca P or Na+ Cl or ClH+ or H or HN3- or O3Ca or O 6. For each ion listed, write a neutral atom and an ion with the indicated charge that would be isoelectronic. ©2019 Grand Canyon University. All Rights Reserved.

Revised 8/16/19

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CHM113 Chapter 7 Resource Worksheets Circle the largest one for each row. Neutral Atom 2-

a) O b) Ba2+ c) Al3+ d) Cle) P3f) Ca2+

Charge +1 -2 -1 +1 +1 +3

Charged Atom

7. Why are cations smaller than parent atoms and anions bigger than parent atoms?

Resource 3: Ionization Energy and Electron Affinity 1. Why does fluorine have a higher ionization energy than iodine?

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

3. Circle the atom in each pair that has the greater ionization energy. a. C or Li b. Ba or Be c. Ne or H d. S or Ar e. I or Si f. Li or Cs

4. Arrange the following groups of atoms in order of increasing first ionization energy. a. Sr, Mg, Ra b. Ca, Se, Ge ©2019 Grand Canyon University. All Rights Reserved.

Revised 8/16/19

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CHM113 c. P, Na, Ar d . Li , Ne , Sc , Cs

Chapter 7 Resource Worksheets

5. Circle the atom in each pair that has the lower electron affinity. a. Se or Ga b. Br or Na c. S or O d. N or As e. F or B

Resource 4: All Periodic and Group Trends 1. Circle the elements in each list that would have the most similar chemical reactivity. a. C N F Si Pb b. P As F S N c. Y K Ba Ca Ar d. Mg Cs Li Na Ar 2. Why do elements in the same family generally have similar properties?

3. Indicate whether the following properties increase or decrease left to right across a period a. atomic radius (excluding noble gases) b. first ionization energy c. electron affinity

Down a group

4. Circle the best choice in each list: a. highest first ionization energy: C, N, Si b largest radius: C4-, C4+, C c. highest electron affinity: As, Sn, S d. smallest atom: Na, Li, Be e. lowest first ionization energy: K, Na, C a.

Atomic radius

Si Br Au Mg

Cl Cl Hf Na

b.

Ionic Radius

K+ FAr Al3+

Cs Ne K+ N3-

c.

Ionization Energy

Na He

K H

©2019 Grand Canyon University. All Rights Reserved.

Revised 8/16/19

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CHM113

d.

Chapter 7 Resource Worksheets N O Al Mg Electron Affinity

Cl O Na H

I F Mg H

©2019 Grand Canyon University. All Rights Reserved.

Revised 8/16/19

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