The most common oxidation state of first transition series is `+2`. Explain. 

What is the most common oxidation state of first transition series?

The most common oxidation states of cerium are

The most common oxidation states of 3d series elements

State the common oxidation state of : Actinides

Which is the most common oxidation state of lanthanoids?

Most common oxidation state of lanthanoids is ul(+5)

Most stable oxidation state of Lanthanoids

Most stable oxidation state of gold is:

What is the common oxidation state of Cu, Ag and Au?

Describe the trend in I.E., electrode potential, atomic radii and oxidation states of elements of first transition series.