Question

sub elements in morden periodic table

Answer 1

The f-block elements, called inner transition metals, which are at the bottom of the periodic table (periods 8 and 9); the 15 elements after barium (atomic number 56) are called lanthanides and the 14 elements after radium (atomic number 88) are called actinides

Answer 2

The f-block elements, called inner transition metals, which are at the bottom of the periodic table (periods 8 and 9); the 15 elements afterbarium (atomic number 56) are calledlanthanides and the 14 elements after radium(atomic number 88) are called actinides.