The value for astatine, At, is missing in this figure. To the nearest 100 kJ/mol,what estimate...
The value for astatine, At, is missing in this figure. To the nearest 100 kJ/mol,what estimate would you make for the first ionization energy of At?
Homework Answers
The ionization energies of halogens are as given below.
| Halogen | Ionization energy |
| Fluorine | 1681 |
| Chlorine | 1251 |
| Bromine | 1140 |
| Iodine | 1008 |
| Astatine |
The ionization energies of astatine is not given. It is estimated to be 900 kJ/mol.
| Halogen | Ionization energy |
| Fluorine | 1681 |
| Chlorine | 1251 |
| Bromine | 1140 |
| Iodine | 1008 |
| Astatine | approx 900 |
We can observe that the ionization energy of halogen decreases by about 100 kJ/mol from chlorine to iodine. Hence, the ionization energy of Astatine will be about 100 kJ/mol lower than that of iodine.
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