Justify the given statement with suitable examples— "the Properties of the elements are a periodic function of their atomic numbers."

Options

1. AElements in the same period exhibit similar chemical properties due to their similar valence electron configur
2. BElements in the same group have different properties because they have different atomic numbers.
3. CThe metallic character of elements decreases across a period as the atomic number increases.
4. DAtomic size increases down a group because of the increase in atomic number.