Is this the correct declension of mater?

Question

Mater
Matri
Matro
Matrum
Matro
Matri
Matrorum
Matris
Matros
Matris
~thanks

Answer 1

No, sorry.

Mater is a 3rd declension noun; you've given it the endings of a 2nd declension masculine noun.

--
-is
-i
-em
-e

-es
-ium
-ibus
-es
-ibus

http://www.everything2.com/title/Latin%2520noun%2520declensions

Answer 2

That plural genitive ending should be

-um (not -ium)

Answer 3

Would it then be...

Mater
Matris
Matri
Matrem
Matre
Matres
Matrum
Matribus
Matres
Matribus

Answer 4

Yes. Perfect!