Science Case study.

State whether the following statement is true or false:
On going down in a group of the periodic table, the number of valence electrons increases.

State whether the following statements are true or false:
According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers.

State whether the following statements are true or false:
The elements in a group have consecutive atomic numbers.

State whether the following statements are true or false:
Newlands divided the elements into horizontal rows of eight elements each.