Nkọwa ngwaahịa: Tantalum na tantalum alloy bụ nke metal refractory;ọ nwere ihe pụrụ iche dielectric, obere plastic br ittle mgbanwe okpomọkụ, magburu onwe corrosion eguzogide, na a ghọtara dị ka ihe kasị mma biocompatible metal ihe.
Ngwa: teknụzụ eletrọnịkị, ikuku ikuku, superconductivity nke okpomọkụ, ụlọ ọrụ ike atọmịk, na ihe ọkụkụ dị elu nke e ji ígwè tantalum mee ihe ka ejirila ya mee ihe n'ọhịa nke akụrụngwa ọgwụ.
Nb
45-105
Nkọwa ngwaahịa: Niobi um na alloy ya bụ ụdị ihe nhazi ihe nrụpụta dị elu dị elu, nke sitere na metal refractory, nwere ihe nrụpụta ọrụ dị mma na ụlọ okpomọkụ na oke okpomọkụ.