Give reason. Why in chemistry of all the lanthanoids is quite similar?

In chemistry of all lanthanoids is quite similar. Why?

Discuss chemistry of lanthanoids.

Give reason why amines are reactive?

Give reason for internal energy of a gas.

Compare the chemistry of actinoids with that of the lanthanoids with reference to (i) electronic configuration (ii) oxidation state (iii) chemical reactivity

Compare the chemistry of actinoids with that of lanthanoids with special reference to- (i) electronic configuration (ii) atomic and ionic radii (iii) oxidation states.

Compare the chemistry of actinoids with that of lanthanoids with special reference to- (i) electronic configuration (ii) oxidation state (iii) atomic and ionic sizes (iv) chemical reactivity

Why is the separation of lanthanoid elements difficult?

Give reason: Zinc oxide becomes yellow on heating

Write one similarity and one difference between the chemistry of lanthanoids and that of actinoids.