The f - block consists of …… series.

p -block consists of

The f-block consists of the two series lanthanoids and actinoids. Because Lanthanum closely resembles the Lanthanoids. The Lanthanoid resemble one another more closely than do the members ofordinary transition elements in any series. They have only one stable oxidation state. The chemistry of the actinoids is on the other hand, much more complicated. The complication arises partly owing to the occurance ofa wide range of oxidation states in these elements and partly because their radioactivity creates special problems in their study Wrong statement of the following is

Mr. Vivek wants to buy a flat in an apartment which consists of 4 blocks, each block consists of 4 floors. In each floor there are 6 flats. In how many ways Vivek can make his choice of the flat.

What are f-block elements? How many series are there? Why they are called f-block elements?

The d-block elements consists mostly of

The atomic hydrogen emits a line spectrum consisting of various series. Which series of hydrogen atomic spectra is lying in the visible region ?

The atomic hydrogen emits lines spectrum consisting of various series.: Name the series observed first.