how many isotopes does it have?
41.
Thallium
Thallium has 41 isotopes which have atomic masses that range from 176 to 216
what is thallium? A chemical element. what are its characteristics? A thallium atom has 81 electrons arranged in the configuration [Xe]4f5d6s6p. It is malleable and sectile enough o be cut with a knife at room temperature. It has a metallic luster.
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Thallium [SEP] Isotopes
Thallium has 41 isotopes which have atomic masses that range from 176 to 216. Tl and Tl are the only stable isotopes and make up nearly all of natural thallium. Tl is the most stable radioisotope, with a half-life of 3.78 years. It is made by the neutron activation of stable thallium in a nuclear reactor. The most useful radioisotope, Tl (half-life 73 hours), decays by electron capture, emitting X-rays (~70–80 keV), and photons of 135 and 167 keV in 10% total abundance; therefore, it has good imaging characteristics without excessive patient radiation dose. It is the most popular isotope used for thallium nuclear cardiac stress tests.