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Question

Let us take the example of Bismuth. It's atomic number is 83 . Then how do we identify whether its atomic sixe increases or decreases?

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Solution

The size of an isolated atom can't be measured because we can't determine the location of the electrons that surround the nucleus.
But we can compare the size of atom by either comparing with periods or groups . And we can also calculate the radii of ionic mettalic or covalent molecules. So by looking the periodic table and following the trend we can calculate all those .

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