Question

what are the melting points of 3d and 4d series elements

Answer 1

Answer:

The d-block elements with more number of unpaired e

−

will have high melting point as more number of unpaired e

−

s present, stronger will be the metallic bond formation. Hence requirement of heat to loosen the bond will be high.

26

Fe:4s

2

3d

6

24

Cr:4s

1

3d

5

25

Mn:4s

2

3d

5

25

Ni:4s

2

3d

8

So, Cr contains more number of unpaired e

−

s hence has high melting point