Q. Which of the following is not correct about transition metals?
A) Their compounds are generally coloured
B) They can form ionic or covalent compounds
C) Their melting and boiling points are high
D) They do not exhibit variable valency
Explanation
(d)
$\ _{30}Zn \rightarrow \lbrack Ar\rbrack 3d^{10}4s^{2}$
$\because$ It $d$-orbital is complete
$\therefore$ It does not show variable valency
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.