In what respects do the properties of group 1 elements differ from those of group 17 elements ? Explain with example by taking one element from each group.

The elements present in the 1st group of the periodic table have 1 electron in its valence shell.

For Example- Lithium has 1 electron in its valence shell.


The element present in the 17th group have 7 electrons in its valence shell.


For example- Fluorine has 7 electrons in its valence shell.


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