Compound Heterogeneous Metalloidn X-Pure substance, Y Mixtures, A-Homogeneous mixtures, C. Non-metals, E. Noble gases. 2JX-Non-metals, Y-Mixtures, A-Homogeneous mixtures, C-pure substance, E-Noble gases. 31X-Homogeneous mixtures, Y-Mixtures, A-Noble gases, C-pure substance, E-Non-metals. IX Pure substance, Y Mixtures, A Noble gases, C-Homogeneous mistures, Non metals.​