pls explain me clearly about dhatu?

 Dhatu literally means in English "Verb".

 If u are not asking it in the favour of sanskrit then it is "Metals".

Verbs (dhAtu)

• Sanskrit divides its verbs in to 10 classes (gaNa).
  gaNa 1, 4, 6, 10 have their stems ending in a and the others in non-a
  Together the a-ending verbs account for almost 90% of the total ~2000 verbs.
• The tenses are denoted by lakaar. There are 10 of these as well.
• The verbs are divided in to three catagories which while not completely random, are not fully deterministic. These are aatmanepadi, parasmaipadi and ubhayapadi (i.e. aatmanepadi and parasmaipadi).
• There are three persons viz. uttama (first), madhyama (second) and prathama (third) just like in English.

dhatu means metals according to science

but according to sanskrit

• Sanskrit divides its verbs in to 10 classes (gaNa).
  gaNa 1, 4, 6, 10 have their stems ending in a and the others in non-a
  Together the a-ending verbs account for almost 90% of the total ~2000 verbs.
• The tenses are denoted by lakaar. There are 10 of these as well.
• The verbs are divided in to three catagories which while not completely random, are not fully deterministic. These are aatmanepadi, parasmaipadi and ubhayapadi (i.e. aatmanepadi and parasmaipadi).
• There are three persons viz. uttama (first), madhyama (second) and prathama (third) just like in English

in sanskrit dhatu means

in sanskrit

COPY CAT

so listen that it is a form of kriya  like as for studying ,drinking,eating and on.....