Question

Write the isotope notation for terbium-165.

Answer 1

Answer:

The isotope notation for terbium-165 = $_{65}^{165}\textrm{X}$

Explanation:

The isotopic representation of an atom is: $_Z^A\textrm{X}$

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

We have, isotope terbium-165

65 = Atomic number of the terbium atom

165 = Mass number of the terbium atom

Tb = Symbol of the terbium atom

The isotope notation for terbium-165 = $_{65}^{165}\textrm{X}$

Answer 2

Naturally occurring terbium (65Tb) is composed of 1 stable isotope, 159Tb.