An atom of this element, substituted with methyl groups, is used as a primary standard in proton NMR.
An atom of this element, substituted with methyl groups, is used as a primary standard in proton NMR. Modern calculations of Avogadro's number utilize X-ray crystallography of this element. This element's band gap is 1.1 electron-volts, which is smaller than all other elements except germanium. Naturally, this element is used by diatoms. Quartz is formed when oxygen bonds to it. This tetravalent element is the second metalloid and is found directly below carbon on the Periodic Table. For 10 points, name this element commonly used in semiconductors with atomic number 14.
An atom of this element, substituted with methyl groups, is used as a primary standard in proton NMR.
silicon [or Si]