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Flashcards - Atoms, Energy & Matter

Flashcards - Atoms, Energy & Matter
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molecule
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds
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mixture
In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically
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compound
A chemical compound is an entity consisting of two or more atoms, at least two from different elements, which associate via chemical bonds
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proton
A proton is a subatomic particle, symbol p or p+, with a positive electric charge of +1e elementary charge and mass slightly less than that of a neutron
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element
In mathematics, an element, or member, of a set is any one of the distinct objects that make up that set
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atom
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element
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atom
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element
element
In mathematics, an element, or member, of a set is any one of the distinct objects that make up that set
proton
A proton is a subatomic particle, symbol p or p+, with a positive electric charge of +1e elementary charge and mass slightly less than that of a neutron
compound
A chemical compound is an entity consisting of two or more atoms, at least two from different elements, which associate via chemical bonds
mixture
In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically
molecule
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds
neutrons
The neutron is a subatomic particle, symbol n or n0, with no net electric charge and a mass slightly larger than that of a proton
solid
Solid is one of the four fundamental states of matter
radioactive substance
Radioactive decay is the process by which the nucleus of an unstable atom loses energy by emitting radiation, including alpha particles, beta particles, gamma rays, and conversion electrons
atomic nucleus
The nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment
colloid
A colloid, in chemistry, is a mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance
electron shell
In chemistry and atomic physics, an electron shell, or a principal energy level, may be thought of as an orbit followed by electrons around an atom's nucleus
Radiation
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium

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