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অ্যাক্টিনাইড মৌল কোনটি?
ক্রোমিয়াম
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ANSWER : 2
Descrption
<p><strong>ল্যান্থানাইড সিরিজ :</strong> Lanthanum (La-57), Cerium (Ce-58), Praseodymium (Pr-59), Neodymium (Nd-60), Promethium (Pm-61), Samarium (Sm-62), Europium (Eu-63), Gadolinium (Gd-64), Terbium (Tb-65), Dysprosium (Dy-66), Holmium (Ho-67), Erbium (Er-68), Thulium (Tm-69), Ytterbium (Yb-70) & Lutetium (Lu-71)</p><p><strong>অ্যাক্টিনাইড সিরিজ :</strong> Actinium (Ac-89), Thorium (Th-90), Protactinium (Pa-91), Uranium (U-92), Neptunium (Np-93), Plutonium (Pu-94), Americium (Am-95), Curium (Cm-96), Berkelium (Bk-97), Californium (Cf-98), Einsteinium (Es-99), Fermium (Fm-100), Mendelevium (Md-101), Nobelium (No-102) & Lawrencium (Lr-103)</p>
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