Which one of the following has smallest size?
Al,Al+,Al2+,Al3+
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Al3+ has the smallest size.
Because of the charge present on it. Al has +3 charge it means it has given out 3 of its electrons from its valance shell. So the number of protons do not vary but the electrons are reduced thus the more number of protons(13) attract the 10 electrons closer to the nucleus thus the size of the Al is compressed and becomes small. And as the valance shell is empty its size gets reduced.
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Because of the charge present on it. Al has +3 charge it means it has given out 3 of its electrons from its valance shell. So the number of protons do not vary but the electrons are reduced thus the more number of protons(13) attract the 10 electrons closer to the nucleus thus the size of the Al is compressed and becomes small. And as the valance shell is empty its size gets reduced.
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Answer:
Explanation:
Al3+ , due to more + in nucleus , the + pulls ē in outer shells. This decreases the atomic size, hence more + more decrease, al 3+ must have smallest size.
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