Berkelium has the electronegativity 1,3 in the L. Pauling scale; terbium has an electronegativity of 1,1.
Berkelium is more reactive than terbium.
You think probable to ytterbium, terbium and erbium.
Terbium has 65 electrons
berkelium is synthetic
berkelium is american
Berkelium is extremely rare, radioactive and unstable; berkelium is not for sale.
Green trichromatic
The symbol for the element Terbium is Tb
The atomic mass of terbium is 158.92
Terbium is flammable and burns with a yellowish flame.
Berkelium has the valences 3+ and 4+.
Terbium is used as a trace impurity in calcium fluoride, calcium tungstate and strontium molybdate. Terbium is used for a stabilizer in fuel cells when the fuel is used at elevated temperatures.
The atomic weight of terbium is 158.93 amu.