Definition of Atomic number 61

1. Noun. A soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium.

Exact synonyms: Pm, Promethium
Generic synonyms: Metal, Metallic Element

Lexicographical Neighbors of Atomic Number 61

atomic number 48
atomic number 49
atomic number 5
atomic number 50
atomic number 51
atomic number 52
atomic number 53
atomic number 54
atomic number 55
atomic number 56
atomic number 57
atomic number 58
atomic number 59
atomic number 6
atomic number 60
atomic number 61 (current term)
atomic number 62
atomic number 63
atomic number 64
atomic number 65
atomic number 66
atomic number 67
atomic number 68
atomic number 69
atomic number 7
atomic number 70
atomic number 71
atomic number 72
atomic number 73
atomic number 74

Literary usage of Atomic number 61

Below you will find example usage of this term as found in modern and/or classical literature:

1. Within the Atom: A Popular View of Electrons and Quanta by John Mills (1921)
"The first six elements in this new series correspond to the first six in the two immediately previous series. The seventh, of atomic number 61 ..."

2. Scientific papers of the Bureau of Standards by United States National Bureau of Standards (1922)
"... scheme of the periodic table of elements requires a new element of atomic number 61 coming between neodymium and samarium.3 Eder * has published similar ..."

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