the basic unit of a chemical element.
ATOM
a part or aspect of something abstract, especially one that is essential or characteristic
ELEMENT
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.
PROTON
matter with both definite and constant composition with distinct chemical properties.
PURE SUBSTANCE
the mass of an atom of a chemical element expressed in atomic mass units.
ATOMIC MASS
store electrical energy in
CHARGE
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.
NEUTRON
a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
ELECTRON
the central and most important part of an object
NUCLEUS
the number of protons in the nucleus of an atom
ATOMIC NUMBER
a thing that is composed of two or more separate elements
COMPOUND
the state or power of being reactive or the degree to which a thing is reactive.
REACTIVITY
characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed.
CHEMICAL PROPERTY
Groups of logically related fields which occur multiple times within a group.
PERIOD GROUP
a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces.
CRYSTAL
An expression which states the number and type of atoms present in a molecule of a substance.
CHEMICAL FORMULA
A mixture which has uniform composition and properties throughout.
HOMOGENEOUS MIXTURE
a subscript letter, figure, or symbol.
SUBSCRIPT
a liquid mixture in which the minor component is uniformly distributed within the major component.
SOLUTION
the symbols in the periodic table
CHEMICAL SYMBOL
any property used to characterize matter and energy and their interactions
PHYSICAL PROPERTY
A mixture that does not have uniform composition and properties throughout.
HETEROGENEOUS MIXTURE
able to dissolve other substances
SOLVENT
the minor component in a solution, dissolved in the solvent.
SOLUTE
the action or process of filtering something
FILTRATION
the action of sifting something
SIFTING
an element whose properties are intermediate between those of metals and solid nonmetals.
METALLOID
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
MOLECULE
an element or substance that is not a metal.
NONMETAL
a solid material that is typically hard, shiny, malleable.
METAL

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