Which of the following are periodic elements: Ti, N, Pt, Fl, Zt, 1L, 2y, O, F, V, Y
The following are periodic elements: Ti, N, Pt, Fl, O, F, V, Y
Instruction: Which of the following are periodic elements: Ti, N, Pt, Fl, Zt, 1L, 2y, O, F, V, Y
Context: 
Response: The following are periodic elements: Ti, N, Pt, Fl, O, F, V, Y