Each layer is doped with tiny amounts of different impurities, usually phosphorus and boron .
Nitrogen, phosphorus, potassium, sulphur and boron have been found to be important in Zambia.
Those with less than an octet are often called electron deficient and are typical of certain elements with an odd number of electrons, such as boron and nitrogen.
They spray boron and energetic nitrogen atoms onto a clean, heated tungsten surface, held at 250 to 500 volts, in an ultrahigh vacuum.
The mineral elements most likely to be deficient in vineyards are nitrogen, potassium, phosphorus, zinc, boron , iron, manganese, and magnesium.
These rare coloured stones are highly treasured; their coloration comes from traces of elements such as boron and nitrogen or from structural flaws in the crystal lattice.
The immobile nutrients are iron, sulfur, calcium, manganese, copper, zinc, boron , molybdenum, and chlorine.
It was not until 1807, however, that Sir Humphrey Davy identified boron as a chemical element.
This product is a laundry aid containing sodium, boron , oxygen, and water.
Diffusion methods modify the chemical composition of the surface with hardening species such as carbon, nitrogen, or boron .