The Goldhammer-Herzfeld ratio of these substances is nearly one.
The Goldhammer-Herzfeld ratio of these substances is nearly one. The oxides of   these elements are used in glassmaking, and these elements are used to dope  semiconductors. As it is lustrous yet brittle, (*) selenium is sometimes considered in this  group, which includes germanium, boron and silicon along the staircase of the periodic table.  For 10 points, give this term for elements with both metal and non-metal properties.
The Goldhammer-Herzfeld ratio of these substances is nearly one.
metalloids (accept semimetals)