State whether the following statements are true or false. Among all the groups, the maximum number of elements is found in the IIIB group.
State whether the following statements are true or false :
(a) Newlands divided the elements into horizontal rows of eight elements each.
(b) According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers.
(c) The elements in a group have consecutive atomic numbers.
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. The element with the atomic number 17 has the least size among all the elements of that period.