element nuclide  z ( p )  n ( n ) isotopic mass ( u )
0      beryllium    9 be        4        5       9.012 182 (3)
1       fluorine    19 f        9       10    18.998 403 2 (5)
2         sodium   23 na       11       12      22.989 770 (2)
3      aluminium   27 al       13       14      26.981 538 (2)
4     phosphorus    31 p       15       16      30.973 761 (2)
5       scandium   45 sc       21       24      44.955 910 (8)
6      manganese   55 mn       25       30      54.938 049 (9)
7         cobalt   59 co       27       32      58.933 200 (9)
8        arsenic   75 as       33       42       74.921 60 (2)
9        yttrium    89 y       39       50       88.905 85 (2)
10       niobium   93 nb       41       52       92.906 38 (2)
11       rhodium  103 rh       45       58      102.905 50 (2)
12        iodine   127 i       53       74      126.904 47 (3)
13       caesium  133 cs       55       78      132.905 45 (2)
14  praseodymium  141 pr       59       82      140.907 65 (2)
15       terbium  159 tb       65       94      158.925 34 (2)
16       holmium  165 ho       67       98      164.930 32 (2)
17       thulium  169 tm       69      100      168.934 21 (2)
18          gold  197 au       79      118      196.966 55 (2)
19       bismuth  209 bi       83      126      208.980 38 (2)
20       thorium  232 th       90      142       232.038 1 (1)
21  protactinium  231 pa       91      140      231.035 88 (2)

Table as JSON:
{"element":{"0":"beryllium","1":"fluorine","2":"sodium","3":"aluminium","4":"phosphorus","5":"scandium","6":"manganese","7":"cobalt","8":"arsenic","9":"yttrium","10":"niobium","11":"rhodium","12":"iodine","13":"caesium","14":"praseodymium","15":"terbium","16":"holmium","17":"thulium","18":"gold","19":"bismuth","20":"thorium","21":"protactinium"},"nuclide":{"0":"9 be","1":"19 f","2":"23 na","3":"27 al","4":"31 p","5":"45 sc","6":"55 mn","7":"59 co","8":"75 as","9":"89 y","10":"93 nb","11":"103 rh","12":"127 i","13":"133 cs","14":"141 pr","15":"159 tb","16":"165 ho","17":"169 tm","18":"197 au","19":"209 bi","20":"232 th","21":"231 pa"},"z ( p )":{"0":4,"1":9,"2":11,"3":13,"4":15,"5":21,"6":25,"7":27,"8":33,"9":39,"10":41,"11":45,"12":53,"13":55,"14":59,"15":65,"16":67,"17":69,"18":79,"19":83,"20":90,"21":91},"n ( n )":{"0":5,"1":10,"2":12,"3":14,"4":16,"5":24,"6":30,"7":32,"8":42,"9":50,"10":52,"11":58,"12":74,"13":78,"14":82,"15":94,"16":98,"17":100,"18":118,"19":126,"20":142,"21":140},"isotopic mass ( u )":{"0":"9.012 182 (3)","1":"18.998 403 2 (5)","2":"22.989 770 (2)","3":"26.981 538 (2)","4":"30.973 761 (2)","5":"44.955 910 (8)","6":"54.938 049 (9)","7":"58.933 200 (9)","8":"74.921 60 (2)","9":"88.905 85 (2)","10":"92.906 38 (2)","11":"102.905 50 (2)","12":"126.904 47 (3)","13":"132.905 45 (2)","14":"140.907 65 (2)","15":"158.925 34 (2)","16":"164.930 32 (2)","17":"168.934 21 (2)","18":"196.966 55 (2)","19":"208.980 38 (2)","20":"232.038 1 (1)","21":"231.035 88 (2)"}}