Question

IN
Na, Sl, SC, IV, L, IT, Lul, 10, TIU
Write the G.O.E.C of s, p, d & f block elements
8. Write the G.O.E.C of LG, R.E, T.E & I.T Elements
9. What are representative elements & Noble gases
10. Define TE & ITE.
11. "All TE are d block but all d block elements need not be T.E”, explain
Alf block elements are I.T.E & all I.T.E are 1 block explain.
13 Why Zn, Cd, Hg (z = 30, 48, 80) though belongs to d block but not T.E? ex
14 Write the group 13 & 17 elements symbols & atomic numbers.
15. Write the G.O.E.C of IA, IIIA, VA& VIIA groups
16. What are rare earths
17. What are Transuranic elements.
18. Write the elements & atomic numbers of 3d, 4d & 5d series
19. Write the starting and ending elements of f block i.e Lanthanides & f bloc
20. Write the position [i.e group & period) of 'f block i.e Lanthanides (4f) &
21. What are Pnicogens, chalcogens, Halogens, Rare gases(Aerogens)
22. What are Bridge elements​

Answer 1

Answer:

16.any of a group of chemically similar metallic elements comprising the lanthanide series and (usually) scandium and yttrium. They are not especially rare, but they tend to occur together in nature and are difficult to separate from one another.

22. Bridge elements are elements which show similarities in properties diagonally with the period of the next group. Bridge' the gap between the alkali and alkali earth metals (groups 1 & 2) on one side, and the metalloids/nonmetals (groups 13 - 18) on the other side.