if-mercury-201-undergoes-beta-decay-what-is-the-resulting-element-and-its-atomic

Question

If mercury-201 undergoes beta decay, what is the resulting element and its atomic number?

Accepted Answer

Thallium-201 with atomic number 81.

Answer

Mercury-200 with atomic number 80.

Answer

Gold-201 with atomic number 79.

Answer

Lead-201 with atomic number 82.