Atomic Number 73, it has similar outer electron distribution to that of Niobium (41) and vanadium (23), and so has some similarities chemically with those, as a transition metal.
Tantalum
TA- Tantalum
Tantalum (Ta)
Tantalum
Astatine is placed in group-17 in the Periodic Table. Its symbol is At.
Compounds are not placed in the periodic table.
Actinoids are placed in a separate row under the periodic table.
Lanthanum and tantalum.
If new elements are placed, then they would be appended in the periodic table. It won't disturb existing periodic table.
Vanadium, Niobium, Tantalum and probably Dubnium.
Coltan is not an element on the Periodic Table. Coltan is a mineral from which niobium and tantalum are extracted from.
CO3 is not placed in periodic table. Only elements are arranged in periodic table.