CREATE TABLE table_101336_1 (t_c__k_ VARCHAR, notation VARCHAR)

What is the number for t c (k) when the notation is tl-2212?
SELECT COUNT(t_c__k_) FROM table_101336_1 WHERE notation = "Tl-2212"
SELECT COUNT("t_c__k_") FROM "table_101336_1" WHERE "Tl-2212" = "notation"