Chemical element with the atomic number of 41
Chemical eelement with the atomic number of 41
Niobium (chemical symbol - Nb, from Lat. Niobium, obsolete. name - columbium) is a chemical element of the 5th group (according to the outdated classification - the fifth group of the secondary subgroup, VB), the fourth period of the periodic system of chemical elements of D. I. Mendeleev, with atomic number 41.
The simple substance niobium is a shiny transition metal of silver-gray color with a cubic volume-centered crystal lattice of type α-Fe, a = 0.3294. Isotopes with mass numbers from 81 to 113 are known for niobium