Table:
text: Mononuclidic element
Complete list of the 22 mononuclidic elements
Complete list of the 22 mononuclidic elements
Element_ Nuclide Z_p_ N_n_ isotopic_mass_u_
beryllium 9 Be 4 5 9.012 182(3)
fluorine 19 F 9 10 18.998 403 2(5)
sodium 23 Na 11 12 22.989 770(2)
aluminium 27 Al 13 14 26.981 538(2)
phosphorus 31 P 15 16 30.973 761(2)
scandium 45 Sc 21 24 44.955 910(8)
manganese 55 Mn 25 30 54.938 049(9)
cobalt 59 Co 27 32 58.933 200(9)
arsenic 75 As 33 42 74.921 60(2)
yttrium 89 Y 39 50 88.905 85(2)
niobium 93 Nb 41 52 92.906 38(2)
rhodium 103 Rh 45 58 102.905 50(2)
iodine 127 I 53 74 126.904 47(3)
caesium 133 Cs 55 78 132.905 45(2)

Question: What is the highest Z(p) when arsenic is the element and N(n) is more than 42 for a mononuclide element?

Question: What is the highest Z(p) when N(n) is less than 30 and scandium is the element for mononuclide element?

Question: What is the isotopic mass (u) when the nuclide 89 y is among the mononuclide elements?

Question: What is the element if the nuclide is 55 million among the mononuclide elements?