A solid that has an irregular, badly defined arrangement of atoms in it.
The smallest particle of an element. It is made up of protons, electrons and neutrons.
A substance containing atoms or ions of two or more elements that are chemically combined.
A solid that has a regular arrangement of atoms in it.
The rate of flow of electric charge.
A substance used to colour
The energy emitted by the sun which consists of gamma ray, x-ray, ultra-violet, visible light, infra-red, microwave and radio-wave regions, defined by the wavelength of the radiation.
A negatively-charged particle found in an atom.
A material that moves electrons from one place to another.
To let out or release.
A definite stable energy that a system can have, e.g. an atom.
An electron-hole pair formed in a small space after absorption of energy.
A molecule made from carbon atoms that is round in shape, like a football.
The postively-charged space formed when an electron has left an atom or molecule.
A material that moves positive “holes” from one place to another.
The arrangement of particles in a crystal.
A material that emits light but not heat.
A substance or thing of which something is made of.
Two or more atoms bonded together. The atoms can be from the same element or different elements.
A very small crystal that has dimensions on the nanometre scale, or 10-9 metres.
Any technology that makes use of materials that are on the nanometre scale.
A compound of oxygen and another element.
A circuit in which the power source is directly connected up to two or more components. If there is a break in the circuit, only the component in that particular circuit will be affected.
A particle of light.
Used to describe something that converts light energy into electrical energy.
A long chain of repeating units
The behaviour and character of something.
A postively charged particle found at the centre of an atom.
A substance that conducts electricity under certain conditions.
A circuit in which the power source is connected up to the components one after another. If the circuit breaks anywhere, none of the components will work.
A device that converts sunlight into electricity
total internal reflection
The way light can travel through a substance by bouncing off the “walls” of it so that the light is always confined within the substance.
A semiconductor consisting of a combination of the elements titanium and oxygen.
The potential different or “push” between two points.
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