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Tantalum is a chemical element; it has symbol Ta and atomic number 73. It is named after Tantalus, a figure in Greek mythology. [11] Tantalum is a very hard, ductile, lustrous, blue-gray transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as components of strong high-melting ...
73 as a star number (up to blue dots). 37, its dual permutable prime, is the preceding consecutive star number (up to green dots). 73 and 37 are also consecutive star numbers, equivalently consecutive centered dodecagonal (12-gonal) numbers (respectively the 4th and the 3rd). [2]
The number 17. Fear of the number 17 is known as heptadecaphobia and is prominent in Italian culture. [6] The number 39. Fear of the number 39 is known as the curse of 39, especially in Afghan culture. [7] The number 43. In Japanese culture, maternity wards numbered 43 are considered taboo, as the word for the number means "still birth". [8 ...
72 is the sum between 60 and 12, the former being the second unitary perfect number before 6 (and the latter the smallest of only two sublime numbers). More specifically, twelve is also the number of divisors of 60, as the smallest number with this many divisors. [19] 72 is the number of distinct {7/2} magic heptagrams, all with a magic ...
The alchemical symbol for the sun and various sun gods. Also the alchemical symbol for gold which is the metal represented by the Sun which is the astral counterpart. Cross of Saint Peter (Petrine Cross) Peter requested to be crucified upside down, as he felt unworthy to die in the same manner as Christ. Used as a symbol of Saint Peter. A very ...
73 may refer to: 73 (number) one of the years 73 BC, AD 73, 1973, 2073; 73, a United States-based amateur radio magazine; 73 Best regards, a popular Morse code ...
The valknut: According to scholar Leszek Gardeła, "Probably the most vivid manifestation of the number nine motif in the material culture of the Viking Age comes in the form of the so-called valknútr, a symbol carved in wood, metal and stone which usually takes the form of three inter-locking triangles (giving a total of nine triangle points)."
Morse code abbreviations are not the same as prosigns.Morse abbreviations are composed of (normal) textual alpha-numeric character symbols with normal Morse code inter-character spacing; the character symbols in abbreviations, unlike the delineated character groups representing Morse code prosigns, are not "run together" or concatenated in the way most prosigns are formed.