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. - The Atomic Structure
Topic 3
16. Electron configuration: Determining half and partially filled electron shells :
1. Which of these ground state electron configurations is of an atom with two partially filled electron
shells? 2) 2 – 8 – 18 – 2 3) 2 – 8 – 18 – 7 4) 2 – 8 - 2
1) 2 – 8 – 8 – 1
2. An atom of which element in the ground state has a partially filled second electron shell ?
1) Hydrogen 2) Lithium 3) Potassium 4) Sodium
3. The atom of which element has an incomplete third electron shell?
1) Calcium 2) Bromine 3) Krypton 4) Silver
4. Which Period 2 atom in the ground state has a half- filled second electron shell?
1) Be
2) B
3) C
4) N
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5. Which of these elements has a completely filled third electron shell? 4) Ne
1) Al
3) Kr
2) Cl
17. Electron configuration: Relating number of protons (nuclear charge) to configuration
1. What is the total number of protons in a neutral atom with a ground state electron
configuration of 2 – 8 – 18 – 32 – 18 – 1?
1) 69 2) 79 3) 118 4) 197
2. A neutral atom with a configuration of 2 – 8 – 8 – 3 will have how many total protons in its nucleus?
1)2 2) 3 3) 8 4) 21
3. An atom has a configuration of 2 – 8 – 18 – 4 – 1. How many protons are there in the nucleus of this
atom? Teacher Preview Copy
1) 1 2) 32 3) 33 4) 18
4. What is the nuclear charge of an atom with a configuration of 2 – 8 – 13 – 1 ?
2) -6
3) -24
4) +24
1) +6
5. What is the nuclear charge of an atom with a configuration of 2–8–18–18–7 ?
1) +53 2) +7 3) -1 4) +1
6. What is the ground state electron configuration of a neutral atom with 27 protons?
3) 2 – 8 – 15 – 2
1) 2 – 8 – 14 – 3
2) 2 – 8 – 8 – 8 – 1 4) 2 – 8 – 17
7. An atom has 17 protons in its nucleus. What is the ground state configuration of this atom?
1) 2 – 8 – 7 3) 2 – 8 – 8 – 7
2) 2 – 8 – 8 - 1 4) 2 – 8 – 6 – 1
8. An atom with a nuclear charge of +48 will have a ground state configuration of
1) 2 – 8 – 8 – 8 – 8 – 8 – 8 3) 2 – 8 – 18 – 18 – 2
4) 2 – 18 – 18 – 2
2) 2 – 8 – 18 – 18 – 2
9. An atom with 19 electrons will have a ground state configuration of
1) 2 – 8 – 8 – 1 2) 2 – 8 – 7 – 2 3) 2 – 8 – 6- 3 4) 2 – 8 – 5 – 4
10. An atom with 34 electrons could have which of the following ground state configurations?
1) 2 – 8 – 8 –16 2) 2 – 8 – 18 – 6 3) 2 – 18 – 8 – 6 4) 2 – 18 – 14
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 175
Topic 3
16. Electron configuration: Determining half and partially filled electron shells :
1. Which of these ground state electron configurations is of an atom with two partially filled electron
shells? 2) 2 – 8 – 18 – 2 3) 2 – 8 – 18 – 7 4) 2 – 8 - 2
1) 2 – 8 – 8 – 1
2. An atom of which element in the ground state has a partially filled second electron shell ?
1) Hydrogen 2) Lithium 3) Potassium 4) Sodium
3. The atom of which element has an incomplete third electron shell?
1) Calcium 2) Bromine 3) Krypton 4) Silver
4. Which Period 2 atom in the ground state has a half- filled second electron shell?
1) Be
2) B
3) C
4) N
Teacher Preview Copy
5. Which of these elements has a completely filled third electron shell? 4) Ne
1) Al
3) Kr
2) Cl
17. Electron configuration: Relating number of protons (nuclear charge) to configuration
1. What is the total number of protons in a neutral atom with a ground state electron
configuration of 2 – 8 – 18 – 32 – 18 – 1?
1) 69 2) 79 3) 118 4) 197
2. A neutral atom with a configuration of 2 – 8 – 8 – 3 will have how many total protons in its nucleus?
1)2 2) 3 3) 8 4) 21
3. An atom has a configuration of 2 – 8 – 18 – 4 – 1. How many protons are there in the nucleus of this
atom? Teacher Preview Copy
1) 1 2) 32 3) 33 4) 18
4. What is the nuclear charge of an atom with a configuration of 2 – 8 – 13 – 1 ?
2) -6
3) -24
4) +24
1) +6
5. What is the nuclear charge of an atom with a configuration of 2–8–18–18–7 ?
1) +53 2) +7 3) -1 4) +1
6. What is the ground state electron configuration of a neutral atom with 27 protons?
3) 2 – 8 – 15 – 2
1) 2 – 8 – 14 – 3
2) 2 – 8 – 8 – 8 – 1 4) 2 – 8 – 17
7. An atom has 17 protons in its nucleus. What is the ground state configuration of this atom?
1) 2 – 8 – 7 3) 2 – 8 – 8 – 7
2) 2 – 8 – 8 - 1 4) 2 – 8 – 6 – 1
8. An atom with a nuclear charge of +48 will have a ground state configuration of
1) 2 – 8 – 8 – 8 – 8 – 8 – 8 3) 2 – 8 – 18 – 18 – 2
4) 2 – 18 – 18 – 2
2) 2 – 8 – 18 – 18 – 2
9. An atom with 19 electrons will have a ground state configuration of
1) 2 – 8 – 8 – 1 2) 2 – 8 – 7 – 2 3) 2 – 8 – 6- 3 4) 2 – 8 – 5 – 4
10. An atom with 34 electrons could have which of the following ground state configurations?
1) 2 – 8 – 8 –16 2) 2 – 8 – 18 – 6 3) 2 – 18 – 8 – 6 4) 2 – 18 – 14
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 175
