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tiny building block of matter, made up of protons, neutrons, and electrons.

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the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

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a thing that is composed of two or more separate elements; a mixture.

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the degree of compactness of a substance.

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a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

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each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, i.e., the number of protons in the nuclei of its atoms.

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A heterogeneous mixture is simply any mixture that is not uniform in composition – it's a non-uniformmixture of smaller constituent parts. Using various means, the parts in the mixture can be separated from one another.

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A homogeneous mixture is a solid, liquid, or gaseous mixturethat has the same proportions of its components throughout any given sample. Conversely, a heterogeneous mixture has components whose proportions vary throughout the sample.

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an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

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each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

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the total number of protons and neutrons in a nucleus.

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physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.

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a substance made by mixing other substances together.

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a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

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a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

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a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

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a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).

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thanks for coming to my ted talk.... have a great day

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thanks for coming to my ted talk.... have a great day