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Periodic table
The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dimitri Mendeleev. Mendeleev intended the table to ... > more -
Integrated circuit
A monolithic integrated circuit (IC) or often referred to as a microchip or simply chip is a miniaturized electronic circuit (consisting mainly of semiconductor devices, as well as passive ... > more -
Atomic orbital
Atomic orbitals are the quantum states of the individual electrons in the electron cloud around a single atom. Specifically, atomic orbitals are the quantum states of the individual electrons in the ... > more -
Heavy metals
A heavy metal is any of a number of higher atomic weight elements, which has the properties of a metallic substance at room temperature. Living organisms require trace amounts of some heavy metals, ... > more
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