Question

CHEMIZONE
52 What is meant by transition elements ? Write their three general characteristics
53. Answer the following:
(a) Why there are 14 elements in lanthanold Series ?
(b) d-block elements are generally called as 'transition elements'. Why?
54 Write the number designation of a group that has 2 electrons beyond a noble gas
configuration
1.Write the number designation of a group that with 12 electrons beyond a noble gas
configuration
55 What is meant by lanthanoids and actinoids ? To which series do man-made elements,
belong?
15. A.B.C.D and E have the following electronic configuration:
A Is*.25 , 2p
B: 15.25, 2p 3s 3p
C 15.2s 2p 3s 3p'
D: 18,25,2p 3s 3p
E 1.2.2p, 35, 3p. 45*
Which among these belong to the same group in the periodic table ? Also classify them in blocks​

Answer 1

Answer:

52. these are the elements having electronic configuration is (nd(1-10)ns(1-2))

Explanation:

its general cerector is

1. these are the colors changing element /so different colors

2. they have several vacant d orbital

3. low ionization energy