p-type silicon is silicon doped with boron gas that turns it into a conductive material that readily accepts electrons when voltage is applied. Boron has only three electrons in its outer shell ...

If the imbalance is too great, radioactive decay will occur. Up to two electrons may exist in the atom's first shell. Up to eight electrons may exist in the atom's second shell. An electron may ...

They have the same number of electrons in their outer shell, so similar chemical properties. Sample exam questions - atomic structure and the periodic table - AQA Understanding how to approach ...