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.