निम्नलिखित में से कौन सा आवधिक तत्व हैं: Ti, N, Pt, Fl, Zt, 1L, 2y, O, F, V, Y
Ti, N, Pt, O, F, V, Y are all valid elements. Fl and Zt are invalid elements as they do not exist in the periodic table. 1L and 2y are not elements.