Question

How do you know that a particular type of soil is fertile or not? Differentiate between naturally determined fertility and culturally induced fertility

Answer 1

$\huge\underline{\overline{\mid{\bold{\red{\mathcal{Answer}}\mid}}}}$

The known f-block elements come in two series, the lanthanides of period 6 and the radioactive actinides of period 7. All are metals. Because the f-orbital electrons are less active in determining the chemistry of these elements, their chemical properties are mostly determined by outer s-orbital electrons.