17. These are the first eight ionization energies for a particular neutral atom. All values are expressed in 10³ kJ/mole (i.e., Ehe first is 1314 kJ/mole). How many valence electrons does this atom possess? 1st 2nd 3rd 4th 5th 6th 7th 8th 1.31 3.39 5.30 7.47 10.99 13.33 71.33 84.01 a) 1 b) 2 c) 4 d) 6 e) 8
17. These are the first eight ionization energies for a particular neutral atom. All values are expressed in 10³ kJ/mole (i.e., Ehe first is 1314 kJ/mole). How many valence electrons does this atom possess? 1st 2nd 3rd 4th 5th 6th 7th 8th 1.31 3.39 5.30 7.47 10.99 13.33 71.33 84.01 a) 1 b) 2 c) 4 d) 6 e) 8
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:**Ionization Energies and Valence Electrons**
**Ionization Energy Problem**
17. These are the first eight ionization energies for a particular neutral atom. All values are expressed in 10^3 kJ/mole (i.e., the first is 1314 kJ/mole). How many valence electrons does this atom possess?
| Ionization Level | Energy (10^3 kJ/mole) |
|------------------|-----------------------|
| 1st | 1.31 |
| 2nd | 3.39 |
| 3rd | 5.30 |
| 4th | 7.47 |
| 5th | 10.99 |
| 6th | 13.33 |
| 7th | 71.33 |
| 8th | 84.01 |
a) 1
b) 2
c) 4
d) 6
e) 8
**Explanation:**
To determine the number of valence electrons, one must look for a significant jump in ionization energy, as this usually indicates the removal of electrons beyond the valence shell. In the given data, you can notice a significant jump in ionization energy between the 6th and 7th ionization energies. This jump suggests that the atom has 6 valence electrons. Therefore, the answer is:
**d) 6**
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