Identify the text present on the blackboard.

The text on the blackboard appears to be related to a physics problem, possibly involving nuclear physics. It includes terms like 'распад' (decay), 'нейтронов' (neutrons), and 'изотопа' (isotope). There are also some mathematical notations and numbers like 'N3', 'Fl', 'c 178', 'c 182', '169', and '144'. Additionally, there are some characters that look like Russian letters or symbols.