Matter

In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be touched are ultimately composed of atoms, which are made up of interacting subatomic particles, and in everyday as well as scientific usage, "matter" generally includes atoms and anything made up of them, and any particles that act as if they have both rest mass and volume. However it does not include massless particles such as photons, or other energy phenomena or waves such as light or heat. Matter exists in various states. These include classical everyday phases such as solid, liquid, and gas – for example water exists as ice, liquid water, and gaseous steam – but other states are possible, including plasma, Bose–Einstein condensates, fermionic condensates, and quark–gluon plasma. Usually atoms can be imagined as a nucleus of protons and neutrons, and a surrounding "cloud" of orbiting electrons which "take up space".

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Beyond Classical Physics: Scientists Discover New State of Matter With Chiral Properties

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Quantum state of matter made with 'dipolar' molecules for first time

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Investigating ultrafast dynamics of matter with attosecond pulses of light

Quantum chemistry experiment on ISS creates exotic 5th state of matter

Physicists Uncover a New State of Matter Hidden in The Quantum World

A New Phase of Matter – Researchers Detail How Disorder Alters Quantum Spin Liquids

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For the first time scientists observe the creation of matter from light

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Down goes antimatter! Gravity's effect on matter's elusive twin is revealed