The number of transition series in the periodic table are

The number of transition series is:

The number of transition series is:

State, whether the following statements is True or False: There are four transition series in the periodic table, consisting of 10 elements each

State, whether the following statements is True or False: There are four transition series in the periodic table, consisting of 10 elements each

The number of periods and groups in the periodic table are.......

The number of periods and groups in the periodic table are______.