Answer:
Na 11/13/11
Yttrium 39/39/50
Cu 64/29/29
Technicium 43/55/43
Lead 82/82/125/82
Tl 81/123/81
Hydrogen 1/1/1
C 6/6/6
Nitrogen 14/7/7/7
Barium 137/56/56/81
Ca 40/20/20/20
Silicon 28/14/14/14
Ar 40/18/22/18
Explanation:
HOPE IT HELPS. I KNOW THIS KASI NALESSON NAMIN 'TO AND THIS IS ONE OF MY FAV.
SABIHIN MO LANG PAG MAY MALI OR WHAT UULITIN KO.
