PERIODIC SYSTEM OF THE ELEMENTS
\pˌi͡əɹɪˈɒdɪk sˈɪstəm ɒvðɪ ˈɛlɪmənts], \pˌiəɹɪˈɒdɪk sˈɪstəm ɒvðɪ ˈɛlɪmənts], \p_ˌiə_ɹ_ɪ__ˈɒ_d_ɪ_k s_ˈɪ_s_t_ə_m ɒ_v_ð_ɪ_ ˈɛ_l_ɪ_m_ə_n_t_s]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.