The second-most abundant element in the Earth's crust, it is, like carbon, often found bonded to four other atoms.
A molecule with an atom of this element bonded to four methyl groups is used as the standard in NMR. This element's carbide is often used as an abrasive. The second-most abundant element in the Earth's crust, it is, like carbon, often found bonded to four other atoms. A dioxide of this element makes up the cell wall of diatoms and is commonly found in sand and quartz. This element is highly used as a semiconductor in electronics. For 10 points, name this metalloid element with atomic number 14 and symbol Si.
A molecule with an atom of this element bonded to four methyl groups is used as the standard in NMR.
{silicon} [accept {Si} until the end of the question]