What is daughter isotope?

Some articles on isotope, daughter isotope:

Radium Series
... decay directly to a stable state, but rather undergo a series of decays until eventually a stable isotope is reached ... A parent isotope is one that undergoes decay to form a daughter isotope ... The daughter isotope may be stable or it may decay to form a daughter isotope of its own ...

Famous quotes containing the word daughter:

    [T]he syndrome known as life is too diffuse to admit of palliation. For every symptom that is eased, another is made worse. The horse leech’s daughter is a closed system. Her quantum of wantum cannot vary.
    Samuel Beckett (1906–1989)