Which of the following is not a property of lanthanides?
A. They are soft metals with white silvery color
B. They tarnish rapidly by air
C. The hardness of the metals increases with increase in the atomic number
D. The melting point of the metal ranges from 500-1000K
Answer:D
Which of the following is not a property of lanthanides?
A. They are soft metals with white silvery color B. They tarnish rapidly by air C. The hardness of the metals increases with increase in the atomic number D. The melting point of the metal ranges from 500-1000K