Given below are the names of few elements based on their position in t...
Incorrect Placement of Element: Iodine
Explanation:
1. Introduction:
In the given options, we need to identify the element that is not correctly placed based on its properties and characteristics. Let's evaluate each option to find the correct answer.
2. Evaluation of Options:
a) Aluminium:
- Aluminium is a metal that belongs to Group 13 (or Group IIIA) of the periodic table.
- It has an atomic number of 13, indicating that it has 13 electrons.
- Aluminium tends to lose three electrons to achieve a stable electron configuration like its nearest noble gas, neon.
- Therefore, the statement that aluminium tends to lose three electrons is correct.
b) Iodine:
- Iodine is a nonmetal that belongs to Group 17 (or Group VIIA) of the periodic table.
- It has an atomic number of 53, indicating that it has 53 electrons.
- Iodine tends to gain one electron to achieve a stable electron configuration like its nearest noble gas, xenon.
- The statement in the given option that iodine tends to gain two electrons is incorrect.
- Therefore, this option is the correct answer.
c) Silicon:
- Silicon is a metalloid that belongs to Group 14 (or Group IVA) of the periodic table.
- It has an atomic number of 14, indicating that it has 14 electrons.
- Silicon tends to share four electrons to achieve a stable electron configuration.
- Therefore, the statement that silicon has a valency of four is correct.
d) Plutonium:
- Plutonium is a transuranium element that belongs to the actinide series of the periodic table.
- It has an atomic number of 94, indicating that it has 94 electrons.
- Plutonium is a radioactive element that does not occur naturally in significant quantities on Earth.
- Therefore, the statement that plutonium is a transuranium element is correct.
3. Conclusion:
Based on the evaluation of each option, it can be concluded that the element which is not correctly placed is iodine as it tends to gain one electron, not two electrons as mentioned in the given option.
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