# Professor Roman loves to teach unorthodox Chemistry

His famous phrase in class was “ Elementary Watson”.

Given:

$$IRON$$ = $$5$$ - $$4$$

$$M$$ = $$6$$ - $$9$$

Find the Missing Element M.

• @Uvc - Roman might write the two elements before this answer as $6 - 10$ and $\pi - 1$ :P – Tom Jun 10 '19 at 11:48